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Finding the Fourth Proportional to 13,700.57, 18,906.81 and 7,412.95

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Solution

The fourth proportional to 13,700.57, 18,906.81 and 7,412.95 is: 10,229.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.57 : 18,906.81 = 7,412.95 : x
  2. Step 2: Convert to fraction form
    13,700.57/18,906.81 = 7,412.95/x
  3. Step 3: Cross multiply
    13,700.57x = 18,906.81 × 7,412.95
  4. Step 4: Simplify right side
    13,700.57x = 140,155,142.66
  5. Step 5: Solve for x
    x = 140,155,142.66/13,700.57
  6. Step 6: Final answer
    x = 10,229.88

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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.