Home / 39,404.88-54,378.57-21,499.74

Finding the Fourth Proportional to 39,404.88, 54,378.57 and 21,499.74

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Solution

The fourth proportional to 39,404.88, 54,378.57 and 21,499.74 is: 29,669.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,404.88 : 54,378.57 = 21,499.74 : x
  2. Step 2: Convert to fraction form
    39,404.88/54,378.57 = 21,499.74/x
  3. Step 3: Cross multiply
    39,404.88x = 54,378.57 × 21,499.74
  4. Step 4: Simplify right side
    39,404.88x = 1,169,125,116.57
  5. Step 5: Solve for x
    x = 1,169,125,116.57/39,404.88
  6. Step 6: Final answer
    x = 29,669.55

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Double scale
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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.