Home / 21,001.38-28,983.92-15,686.97

Finding the Fourth Proportional to 21,001.38, 28,983.92 and 15,686.97

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Solution

The fourth proportional to 21,001.38, 28,983.92 and 15,686.97 is: 21,649.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.38 : 28,983.92 = 15,686.97 : x
  2. Step 2: Convert to fraction form
    21,001.38/28,983.92 = 15,686.97/x
  3. Step 3: Cross multiply
    21,001.38x = 28,983.92 × 15,686.97
  4. Step 4: Simplify right side
    21,001.38x = 454,669,805.09
  5. Step 5: Solve for x
    x = 454,669,805.09/21,001.38
  6. Step 6: Final answer
    x = 21,649.52

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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.