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Finding the Fourth Proportional to 8,427.47, 12,641.21 and 2,880.87

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Solution

The fourth proportional to 8,427.47, 12,641.21 and 2,880.87 is: 4,321.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.47 : 12,641.21 = 2,880.87 : x
  2. Step 2: Convert to fraction form
    8,427.47/12,641.21 = 2,880.87/x
  3. Step 3: Cross multiply
    8,427.47x = 12,641.21 × 2,880.87
  4. Step 4: Simplify right side
    8,427.47x = 36,417,689.85
  5. Step 5: Solve for x
    x = 36,417,689.85/8,427.47
  6. Step 6: Final answer
    x = 4,321.31

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