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Finding the Fourth Proportional to 8,620.78, 11,897.97 and 5,265.53

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Solution

The fourth proportional to 8,620.78, 11,897.97 and 5,265.53 is: 7,267.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.78 : 11,897.97 = 5,265.53 : x
  2. Step 2: Convert to fraction form
    8,620.78/11,897.97 = 5,265.53/x
  3. Step 3: Cross multiply
    8,620.78x = 11,897.97 × 5,265.53
  4. Step 4: Simplify right side
    8,620.78x = 62,649,117.97
  5. Step 5: Solve for x
    x = 62,649,117.97/8,620.78
  6. Step 6: Final answer
    x = 7,267.22

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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.