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Finding the Fourth Proportional to 8,987.59, 12,313.05 and 8,650.90

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Solution

The fourth proportional to 8,987.59, 12,313.05 and 8,650.90 is: 11,851.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.59 : 12,313.05 = 8,650.90 : x
  2. Step 2: Convert to fraction form
    8,987.59/12,313.05 = 8,650.90/x
  3. Step 3: Cross multiply
    8,987.59x = 12,313.05 × 8,650.90
  4. Step 4: Simplify right side
    8,987.59x = 106,518,933.46
  5. Step 5: Solve for x
    x = 106,518,933.46/8,987.59
  6. Step 6: Final answer
    x = 11,851.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.