Home / 21,006.97-28,989.56-11,575.53

Finding the Fourth Proportional to 21,006.97, 28,989.56 and 11,575.53

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Solution

The fourth proportional to 21,006.97, 28,989.56 and 11,575.53 is: 15,974.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.97 : 28,989.56 = 11,575.53 : x
  2. Step 2: Convert to fraction form
    21,006.97/28,989.56 = 11,575.53/x
  3. Step 3: Cross multiply
    21,006.97x = 28,989.56 × 11,575.53
  4. Step 4: Simplify right side
    21,006.97x = 335,569,550.41
  5. Step 5: Solve for x
    x = 335,569,550.41/21,006.97
  6. Step 6: Final answer
    x = 15,974.20

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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.