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Finding the Fourth Proportional to 8,642.11, 12,938.22 and 5,073.43

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Solution

The fourth proportional to 8,642.11, 12,938.22 and 5,073.43 is: 7,595.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.11 : 12,938.22 = 5,073.43 : x
  2. Step 2: Convert to fraction form
    8,642.11/12,938.22 = 5,073.43/x
  3. Step 3: Cross multiply
    8,642.11x = 12,938.22 × 5,073.43
  4. Step 4: Simplify right side
    8,642.11x = 65,641,153.49
  5. Step 5: Solve for x
    x = 65,641,153.49/8,642.11
  6. Step 6: Final answer
    x = 7,595.50

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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.