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Finding the Fourth Proportional to 11,921.27, 16,451.03 and 6,615.95

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Solution

The fourth proportional to 11,921.27, 16,451.03 and 6,615.95 is: 9,129.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.27 : 16,451.03 = 6,615.95 : x
  2. Step 2: Convert to fraction form
    11,921.27/16,451.03 = 6,615.95/x
  3. Step 3: Cross multiply
    11,921.27x = 16,451.03 × 6,615.95
  4. Step 4: Simplify right side
    11,921.27x = 108,839,126.21
  5. Step 5: Solve for x
    x = 108,839,126.21/11,921.27
  6. Step 6: Final answer
    x = 9,129.83

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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.