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Finding the Fourth Proportional to 8,987.76, 12,402.99 and 5,008.64

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Solution

The fourth proportional to 8,987.76, 12,402.99 and 5,008.64 is: 6,911.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.76 : 12,402.99 = 5,008.64 : x
  2. Step 2: Convert to fraction form
    8,987.76/12,402.99 = 5,008.64/x
  3. Step 3: Cross multiply
    8,987.76x = 12,402.99 × 5,008.64
  4. Step 4: Simplify right side
    8,987.76x = 62,122,049.82
  5. Step 5: Solve for x
    x = 62,122,049.82/8,987.76
  6. Step 6: Final answer
    x = 6,911.85

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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.