Home / 39,381.72-54,346.08-21,476.76

Finding the Fourth Proportional to 39,381.72, 54,346.08 and 21,476.76

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Solution

The fourth proportional to 39,381.72, 54,346.08 and 21,476.76 is: 29,637.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,381.72 : 54,346.08 = 21,476.76 : x
  2. Step 2: Convert to fraction form
    39,381.72/54,346.08 = 21,476.76/x
  3. Step 3: Cross multiply
    39,381.72x = 54,346.08 × 21,476.76
  4. Step 4: Simplify right side
    39,381.72x = 1,167,177,717.10
  5. Step 5: Solve for x
    x = 1,167,177,717.10/39,381.72
  6. Step 6: Final answer
    x = 29,637.55

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Find fourth proportional to 19,690.86, 27,173.04 and 10,738.38
Half scale
Find fourth proportional to 78,763.44, 108,692.16 and 42,953.52
Double scale
Find fourth proportional to 39,382.72, 54,347.46 and 21,477.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.