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Finding the Fourth Proportional to 25,990.88, 38,980.61 and 7,265.90

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Solution

The fourth proportional to 25,990.88, 38,980.61 and 7,265.90 is: 10,897.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,990.88 : 38,980.61 = 7,265.90 : x
  2. Step 2: Convert to fraction form
    25,990.88/38,980.61 = 7,265.90/x
  3. Step 3: Cross multiply
    25,990.88x = 38,980.61 × 7,265.90
  4. Step 4: Simplify right side
    25,990.88x = 283,228,982.97
  5. Step 5: Solve for x
    x = 283,228,982.97/25,990.88
  6. Step 6: Final answer
    x = 10,897.25

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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.