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Finding the Fourth Proportional to 13,700.52, 18,906.75 and 7,412.90

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Solution

The fourth proportional to 13,700.52, 18,906.75 and 7,412.90 is: 10,229.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.52 : 18,906.75 = 7,412.90 : x
  2. Step 2: Convert to fraction form
    13,700.52/18,906.75 = 7,412.90/x
  3. Step 3: Cross multiply
    13,700.52x = 18,906.75 × 7,412.90
  4. Step 4: Simplify right side
    13,700.52x = 140,153,752.54
  5. Step 5: Solve for x
    x = 140,153,752.54/13,700.52
  6. Step 6: Final answer
    x = 10,229.81

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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.