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Finding the Fourth Proportional to 8,642.11, 12,951.01 and 4,938.79

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Solution

The fourth proportional to 8,642.11, 12,951.01 and 4,938.79 is: 7,401.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.11 : 12,951.01 = 4,938.79 : x
  2. Step 2: Convert to fraction form
    8,642.11/12,951.01 = 4,938.79/x
  3. Step 3: Cross multiply
    8,642.11x = 12,951.01 × 4,938.79
  4. Step 4: Simplify right side
    8,642.11x = 63,962,318.68
  5. Step 5: Solve for x
    x = 63,962,318.68/8,642.11
  6. Step 6: Final answer
    x = 7,401.24

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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.