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Finding the Fourth Proportional to 8,836.20, 13,232.70 and 8,447.40

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Solution

The fourth proportional to 8,836.20, 13,232.70 and 8,447.40 is: 12,650.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,836.20 : 13,232.70 = 8,447.40 : x
  2. Step 2: Convert to fraction form
    8,836.20/13,232.70 = 8,447.40/x
  3. Step 3: Cross multiply
    8,836.20x = 13,232.70 × 8,447.40
  4. Step 4: Simplify right side
    8,836.20x = 111,781,909.98
  5. Step 5: Solve for x
    x = 111,781,909.98/8,836.20
  6. Step 6: Final answer
    x = 12,650.45

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.