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Finding the Fourth Proportional to 9,387.72, 12,951.24 and 8,641.68

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Solution

The fourth proportional to 9,387.72, 12,951.24 and 8,641.68 is: 11,922.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387.72 : 12,951.24 = 8,641.68 : x
  2. Step 2: Convert to fraction form
    9,387.72/12,951.24 = 8,641.68/x
  3. Step 3: Cross multiply
    9,387.72x = 12,951.24 × 8,641.68
  4. Step 4: Simplify right side
    9,387.72x = 111,920,471.68
  5. Step 5: Solve for x
    x = 111,920,471.68/9,387.72
  6. Step 6: Final answer
    x = 11,922.01

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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.