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Finding the Fourth Proportional to 10,728.40, 16,073.40 and 9,192.40

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Solution

The fourth proportional to 10,728.40, 16,073.40 and 9,192.40 is: 13,772.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,728.40 : 16,073.40 = 9,192.40 : x
  2. Step 2: Convert to fraction form
    10,728.40/16,073.40 = 9,192.40/x
  3. Step 3: Cross multiply
    10,728.40x = 16,073.40 × 9,192.40
  4. Step 4: Simplify right side
    10,728.40x = 147,753,122.16
  5. Step 5: Solve for x
    x = 147,753,122.16/10,728.40
  6. Step 6: Final answer
    x = 13,772.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.