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Finding the Fourth Proportional to 8,988.98, 12,416.88 and 8,150.62

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Solution

The fourth proportional to 8,988.98, 12,416.88 and 8,150.62 is: 11,258.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,988.98 : 12,416.88 = 8,150.62 : x
  2. Step 2: Convert to fraction form
    8,988.98/12,416.88 = 8,150.62/x
  3. Step 3: Cross multiply
    8,988.98x = 12,416.88 × 8,150.62
  4. Step 4: Simplify right side
    8,988.98x = 101,205,270.47
  5. Step 5: Solve for x
    x = 101,205,270.47/8,988.98
  6. Step 6: Final answer
    x = 11,258.82

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Double scale
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Similar ratio
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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.