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Finding the Fourth Proportional to 8,987.62, 12,399.99 and 5,007.98

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Solution

The fourth proportional to 8,987.62, 12,399.99 and 5,007.98 is: 6,909.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.62 : 12,399.99 = 5,007.98 : x
  2. Step 2: Convert to fraction form
    8,987.62/12,399.99 = 5,007.98/x
  3. Step 3: Cross multiply
    8,987.62x = 12,399.99 × 5,007.98
  4. Step 4: Simplify right side
    8,987.62x = 62,098,901.92
  5. Step 5: Solve for x
    x = 62,098,901.92/8,987.62
  6. Step 6: Final answer
    x = 6,909.38

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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.