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Finding the Fourth Proportional to 8,909.92, 12,270.61 and 8,716.16

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Solution

The fourth proportional to 8,909.92, 12,270.61 and 8,716.16 is: 12,003.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.92 : 12,270.61 = 8,716.16 : x
  2. Step 2: Convert to fraction form
    8,909.92/12,270.61 = 8,716.16/x
  3. Step 3: Cross multiply
    8,909.92x = 12,270.61 × 8,716.16
  4. Step 4: Simplify right side
    8,909.92x = 106,952,619.61
  5. Step 5: Solve for x
    x = 106,952,619.61/8,909.92
  6. Step 6: Final answer
    x = 12,003.77

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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.