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Finding the Fourth Proportional to 8,454.35, 12,681.53 and 8,308.55

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Solution

The fourth proportional to 8,454.35, 12,681.53 and 8,308.55 is: 12,462.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,454.35 : 12,681.53 = 8,308.55 : x
  2. Step 2: Convert to fraction form
    8,454.35/12,681.53 = 8,308.55/x
  3. Step 3: Cross multiply
    8,454.35x = 12,681.53 × 8,308.55
  4. Step 4: Simplify right side
    8,454.35x = 105,365,084.54
  5. Step 5: Solve for x
    x = 105,365,084.54/8,454.35
  6. Step 6: Final answer
    x = 12,462.83

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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.