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Finding the Fourth Proportional to 8,977.62, 12,387.05 and 5,147.49

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Solution

The fourth proportional to 8,977.62, 12,387.05 and 5,147.49 is: 7,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.62 : 12,387.05 = 5,147.49 : x
  2. Step 2: Convert to fraction form
    8,977.62/12,387.05 = 5,147.49/x
  3. Step 3: Cross multiply
    8,977.62x = 12,387.05 × 5,147.49
  4. Step 4: Simplify right side
    8,977.62x = 63,762,165.98
  5. Step 5: Solve for x
    x = 63,762,165.98/8,977.62
  6. Step 6: Final answer
    x = 7,102.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.