Home / 21,129.17-29,158.70-11,569.46

Finding the Fourth Proportional to 21,129.17, 29,158.70 and 11,569.46

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Solution

The fourth proportional to 21,129.17, 29,158.70 and 11,569.46 is: 15,966.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.17 : 29,158.70 = 11,569.46 : x
  2. Step 2: Convert to fraction form
    21,129.17/29,158.70 = 11,569.46/x
  3. Step 3: Cross multiply
    21,129.17x = 29,158.70 × 11,569.46
  4. Step 4: Simplify right side
    21,129.17x = 337,350,209.66
  5. Step 5: Solve for x
    x = 337,350,209.66/21,129.17
  6. Step 6: Final answer
    x = 15,966.09

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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.