Home / 21,142.31-29,169.14-12,061.15

Finding the Fourth Proportional to 21,142.31, 29,169.14 and 12,061.15

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Solution

The fourth proportional to 21,142.31, 29,169.14 and 12,061.15 is: 16,640.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.31 : 29,169.14 = 12,061.15 : x
  2. Step 2: Convert to fraction form
    21,142.31/29,169.14 = 12,061.15/x
  3. Step 3: Cross multiply
    21,142.31x = 29,169.14 × 12,061.15
  4. Step 4: Simplify right side
    21,142.31x = 351,813,330.14
  5. Step 5: Solve for x
    x = 351,813,330.14/21,142.31
  6. Step 6: Final answer
    x = 16,640.25

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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.