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Finding the Fourth Proportional to 8,807.70, 12,080.21 and 8,331.12

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Solution

The fourth proportional to 8,807.70, 12,080.21 and 8,331.12 is: 11,426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.70 : 12,080.21 = 8,331.12 : x
  2. Step 2: Convert to fraction form
    8,807.70/12,080.21 = 8,331.12/x
  3. Step 3: Cross multiply
    8,807.70x = 12,080.21 × 8,331.12
  4. Step 4: Simplify right side
    8,807.70x = 100,641,684.34
  5. Step 5: Solve for x
    x = 100,641,684.34/8,807.70
  6. Step 6: Final answer
    x = 11,426.55

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.