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Finding the Fourth Proportional to 8,588.70, 12,866.85 and 5,121.90

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Solution

The fourth proportional to 8,588.70, 12,866.85 and 5,121.90 is: 7,673.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,588.70 : 12,866.85 = 5,121.90 : x
  2. Step 2: Convert to fraction form
    8,588.70/12,866.85 = 5,121.90/x
  3. Step 3: Cross multiply
    8,588.70x = 12,866.85 × 5,121.90
  4. Step 4: Simplify right side
    8,588.70x = 65,902,719.02
  5. Step 5: Solve for x
    x = 65,902,719.02/8,588.70
  6. Step 6: Final answer
    x = 7,673.19

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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.