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Finding the Fourth Proportional to 8,869.90, 13,301.70 and 3,930.70

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Solution

The fourth proportional to 8,869.90, 13,301.70 and 3,930.70 is: 5,894.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,869.90 : 13,301.70 = 3,930.70 : x
  2. Step 2: Convert to fraction form
    8,869.90/13,301.70 = 3,930.70/x
  3. Step 3: Cross multiply
    8,869.90x = 13,301.70 × 3,930.70
  4. Step 4: Simplify right side
    8,869.90x = 52,284,992.19
  5. Step 5: Solve for x
    x = 52,284,992.19/8,869.90
  6. Step 6: Final answer
    x = 5,894.65

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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.