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Finding the Fourth Proportional to 10,881.40, 16,285.65 and 9,569.20

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Solution

The fourth proportional to 10,881.40, 16,285.65 and 9,569.20 is: 14,321.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.40 : 16,285.65 = 9,569.20 : x
  2. Step 2: Convert to fraction form
    10,881.40/16,285.65 = 9,569.20/x
  3. Step 3: Cross multiply
    10,881.40x = 16,285.65 × 9,569.20
  4. Step 4: Simplify right side
    10,881.40x = 155,840,641.98
  5. Step 5: Solve for x
    x = 155,840,641.98/10,881.40
  6. Step 6: Final answer
    x = 14,321.75

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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.