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Finding the Fourth Proportional to 13,751.62, 20,593.66 and 12,420.38

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Solution

The fourth proportional to 13,751.62, 20,593.66 and 12,420.38 is: 18,600.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.62 : 20,593.66 = 12,420.38 : x
  2. Step 2: Convert to fraction form
    13,751.62/20,593.66 = 12,420.38/x
  3. Step 3: Cross multiply
    13,751.62x = 20,593.66 × 12,420.38
  4. Step 4: Simplify right side
    13,751.62x = 255,781,082.79
  5. Step 5: Solve for x
    x = 255,781,082.79/13,751.62
  6. Step 6: Final answer
    x = 18,600.07

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.