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Finding the Fourth Proportional to 13,691.86, 18,894.27 and 7,723.42

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Solution

The fourth proportional to 13,691.86, 18,894.27 and 7,723.42 is: 10,658.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.86 : 18,894.27 = 7,723.42 : x
  2. Step 2: Convert to fraction form
    13,691.86/18,894.27 = 7,723.42/x
  3. Step 3: Cross multiply
    13,691.86x = 18,894.27 × 7,723.42
  4. Step 4: Simplify right side
    13,691.86x = 145,928,382.80
  5. Step 5: Solve for x
    x = 145,928,382.80/13,691.86
  6. Step 6: Final answer
    x = 10,658.04

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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.