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Finding the Fourth Proportional to 18,499, 25,528.62 and 10,115.50

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Solution

The fourth proportional to 18,499, 25,528.62 and 10,115.50 is: 13,959.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499 : 25,528.62 = 10,115.50 : x
  2. Step 2: Convert to fraction form
    18,499/25,528.62 = 10,115.50/x
  3. Step 3: Cross multiply
    18,499x = 25,528.62 × 10,115.50
  4. Step 4: Simplify right side
    18,499x = 258,234,755.61
  5. Step 5: Solve for x
    x = 258,234,755.61/18,499
  6. Step 6: Final answer
    x = 13,959.39

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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.