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Finding the Fourth Proportional to 9,432.80, 14,149.20 and 8,412.20

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Solution

The fourth proportional to 9,432.80, 14,149.20 and 8,412.20 is: 12,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,432.80 : 14,149.20 = 8,412.20 : x
  2. Step 2: Convert to fraction form
    9,432.80/14,149.20 = 8,412.20/x
  3. Step 3: Cross multiply
    9,432.80x = 14,149.20 × 8,412.20
  4. Step 4: Simplify right side
    9,432.80x = 119,025,900.24
  5. Step 5: Solve for x
    x = 119,025,900.24/9,432.80
  6. Step 6: Final answer
    x = 12,618.30

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Similar ratio
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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.