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Finding the Fourth Proportional to 8,463.55, 12,681.46 and 8,139.55

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Solution

The fourth proportional to 8,463.55, 12,681.46 and 8,139.55 is: 12,195.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,463.55 : 12,681.46 = 8,139.55 : x
  2. Step 2: Convert to fraction form
    8,463.55/12,681.46 = 8,139.55/x
  3. Step 3: Cross multiply
    8,463.55x = 12,681.46 × 8,139.55
  4. Step 4: Simplify right side
    8,463.55x = 103,221,377.74
  5. Step 5: Solve for x
    x = 103,221,377.74/8,463.55
  6. Step 6: Final answer
    x = 12,195.99

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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.