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Finding the Fourth Proportional to 8,542.10, 12,813.15 and 8,455.70

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Solution

The fourth proportional to 8,542.10, 12,813.15 and 8,455.70 is: 12,683.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,542.10 : 12,813.15 = 8,455.70 : x
  2. Step 2: Convert to fraction form
    8,542.10/12,813.15 = 8,455.70/x
  3. Step 3: Cross multiply
    8,542.10x = 12,813.15 × 8,455.70
  4. Step 4: Simplify right side
    8,542.10x = 108,344,152.46
  5. Step 5: Solve for x
    x = 108,344,152.46/8,542.10
  6. Step 6: Final answer
    x = 12,683.55

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Half scale
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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.