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Finding the Fourth Proportional to 9,219.72, 12,724.98 and 8,657.04

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Solution

The fourth proportional to 9,219.72, 12,724.98 and 8,657.04 is: 11,948.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,219.72 : 12,724.98 = 8,657.04 : x
  2. Step 2: Convert to fraction form
    9,219.72/12,724.98 = 8,657.04/x
  3. Step 3: Cross multiply
    9,219.72x = 12,724.98 × 8,657.04
  4. Step 4: Simplify right side
    9,219.72x = 110,160,660.86
  5. Step 5: Solve for x
    x = 110,160,660.86/9,219.72
  6. Step 6: Final answer
    x = 11,948.37

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Double scale
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Similar ratio
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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.