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Finding the Fourth Proportional to 21,061.92, 29,065.44 and 11,630.40

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Solution

The fourth proportional to 21,061.92, 29,065.44 and 11,630.40 is: 16,049.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061.92 : 29,065.44 = 11,630.40 : x
  2. Step 2: Convert to fraction form
    21,061.92/29,065.44 = 11,630.40/x
  3. Step 3: Cross multiply
    21,061.92x = 29,065.44 × 11,630.40
  4. Step 4: Simplify right side
    21,061.92x = 338,042,693.38
  5. Step 5: Solve for x
    x = 338,042,693.38/21,061.92
  6. Step 6: Final answer
    x = 16,049.95

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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.