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Finding the Fourth Proportional to 8,687.88, 13,001.85 and 5,911.20

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Solution

The fourth proportional to 8,687.88, 13,001.85 and 5,911.20 is: 8,846.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.88 : 13,001.85 = 5,911.20 : x
  2. Step 2: Convert to fraction form
    8,687.88/13,001.85 = 5,911.20/x
  3. Step 3: Cross multiply
    8,687.88x = 13,001.85 × 5,911.20
  4. Step 4: Simplify right side
    8,687.88x = 76,856,535.72
  5. Step 5: Solve for x
    x = 76,856,535.72/8,687.88
  6. Step 6: Final answer
    x = 8,846.41

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1.5x scale

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.