Home / 39,489.60-54,493.68-21,581.32

Finding the Fourth Proportional to 39,489.60, 54,493.68 and 21,581.32

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Solution

The fourth proportional to 39,489.60, 54,493.68 and 21,581.32 is: 29,781.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,489.60 : 54,493.68 = 21,581.32 : x
  2. Step 2: Convert to fraction form
    39,489.60/54,493.68 = 21,581.32/x
  3. Step 3: Cross multiply
    39,489.60x = 54,493.68 × 21,581.32
  4. Step 4: Simplify right side
    39,489.60x = 1,176,045,546.06
  5. Step 5: Solve for x
    x = 1,176,045,546.06/39,489.60
  6. Step 6: Final answer
    x = 29,781.15

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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.