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Finding the Fourth Proportional to 22,519.55, 31,078.89 and 13,087.50

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Solution

The fourth proportional to 22,519.55, 31,078.89 and 13,087.50 is: 18,061.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,519.55 : 31,078.89 = 13,087.50 : x
  2. Step 2: Convert to fraction form
    22,519.55/31,078.89 = 13,087.50/x
  3. Step 3: Cross multiply
    22,519.55x = 31,078.89 × 13,087.50
  4. Step 4: Simplify right side
    22,519.55x = 406,744,972.88
  5. Step 5: Solve for x
    x = 406,744,972.88/22,519.55
  6. Step 6: Final answer
    x = 18,061.86

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.