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Finding the Fourth Proportional to 8,931.62, 12,321.06 and 7,254.92

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Solution

The fourth proportional to 8,931.62, 12,321.06 and 7,254.92 is: 10,008.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.62 : 12,321.06 = 7,254.92 : x
  2. Step 2: Convert to fraction form
    8,931.62/12,321.06 = 7,254.92/x
  3. Step 3: Cross multiply
    8,931.62x = 12,321.06 × 7,254.92
  4. Step 4: Simplify right side
    8,931.62x = 89,388,304.62
  5. Step 5: Solve for x
    x = 89,388,304.62/8,931.62
  6. Step 6: Final answer
    x = 10,008.07

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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.