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Finding the Fourth Proportional to 13,397.87, 18,489.43 and 7,348.39

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Solution

The fourth proportional to 13,397.87, 18,489.43 and 7,348.39 is: 10,140.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.87 : 18,489.43 = 7,348.39 : x
  2. Step 2: Convert to fraction form
    13,397.87/18,489.43 = 7,348.39/x
  3. Step 3: Cross multiply
    13,397.87x = 18,489.43 × 7,348.39
  4. Step 4: Simplify right side
    13,397.87x = 135,867,542.52
  5. Step 5: Solve for x
    x = 135,867,542.52/13,397.87
  6. Step 6: Final answer
    x = 10,140.98

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1.5x scale

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.