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Finding the Fourth Proportional to 8,565.31, 11,812.44 and 7,134.42

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Solution

The fourth proportional to 8,565.31, 11,812.44 and 7,134.42 is: 9,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,565.31 : 11,812.44 = 7,134.42 : x
  2. Step 2: Convert to fraction form
    8,565.31/11,812.44 = 7,134.42/x
  3. Step 3: Cross multiply
    8,565.31x = 11,812.44 × 7,134.42
  4. Step 4: Simplify right side
    8,565.31x = 84,274,908.18
  5. Step 5: Solve for x
    x = 84,274,908.18/8,565.31
  6. Step 6: Final answer
    x = 9,839.10

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Double scale
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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.