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Finding the Fourth Proportional to 39,883.88, 55,039.04 and 21,734.76

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Solution

The fourth proportional to 39,883.88, 55,039.04 and 21,734.76 is: 29,993.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.88 : 55,039.04 = 21,734.76 : x
  2. Step 2: Convert to fraction form
    39,883.88/55,039.04 = 21,734.76/x
  3. Step 3: Cross multiply
    39,883.88x = 55,039.04 × 21,734.76
  4. Step 4: Simplify right side
    39,883.88x = 1,196,260,482.57
  5. Step 5: Solve for x
    x = 1,196,260,482.57/39,883.88
  6. Step 6: Final answer
    x = 29,993.59

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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.