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Finding the Fourth Proportional to 8,308.80, 11,388.24 and 8,251.20

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Solution

The fourth proportional to 8,308.80, 11,388.24 and 8,251.20 is: 11,309.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,308.80 : 11,388.24 = 8,251.20 : x
  2. Step 2: Convert to fraction form
    8,308.80/11,388.24 = 8,251.20/x
  3. Step 3: Cross multiply
    8,308.80x = 11,388.24 × 8,251.20
  4. Step 4: Simplify right side
    8,308.80x = 93,966,645.89
  5. Step 5: Solve for x
    x = 93,966,645.89/8,308.80
  6. Step 6: Final answer
    x = 11,309.29

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Half scale
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Double scale
Find fourth proportional to 8,309.80, 11,389.61 and 8,252.20
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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.