Home / 39,695.05-54,781.14-21,789.91

Finding the Fourth Proportional to 39,695.05, 54,781.14 and 21,789.91

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Solution

The fourth proportional to 39,695.05, 54,781.14 and 21,789.91 is: 30,071.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,695.05 : 54,781.14 = 21,789.91 : x
  2. Step 2: Convert to fraction form
    39,695.05/54,781.14 = 21,789.91/x
  3. Step 3: Cross multiply
    39,695.05x = 54,781.14 × 21,789.91
  4. Step 4: Simplify right side
    39,695.05x = 1,193,676,110.30
  5. Step 5: Solve for x
    x = 1,193,676,110.30/39,695.05
  6. Step 6: Final answer
    x = 30,071.16

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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.