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Finding the Fourth Proportional to 38,605.55, 57,913.00 and 13,640.48

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Solution

The fourth proportional to 38,605.55, 57,913.00 and 13,640.48 is: 20,462.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,605.55 : 57,913.00 = 13,640.48 : x
  2. Step 2: Convert to fraction form
    38,605.55/57,913.00 = 13,640.48/x
  3. Step 3: Cross multiply
    38,605.55x = 57,913.00 × 13,640.48
  4. Step 4: Simplify right side
    38,605.55x = 789,961,011.75
  5. Step 5: Solve for x
    x = 789,961,011.75/38,605.55
  6. Step 6: Final answer
    x = 20,462.37

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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.