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Finding the Fourth Proportional to 8,898.76, 12,280.14 and 6,351.21

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Solution

The fourth proportional to 8,898.76, 12,280.14 and 6,351.21 is: 8,764.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.76 : 12,280.14 = 6,351.21 : x
  2. Step 2: Convert to fraction form
    8,898.76/12,280.14 = 6,351.21/x
  3. Step 3: Cross multiply
    8,898.76x = 12,280.14 × 6,351.21
  4. Step 4: Simplify right side
    8,898.76x = 77,993,747.97
  5. Step 5: Solve for x
    x = 77,993,747.97/8,898.76
  6. Step 6: Final answer
    x = 8,764.56

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