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Finding the Fourth Proportional to 10,791.36, 14,877.12 and 8,393.88

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Solution

The fourth proportional to 10,791.36, 14,877.12 and 8,393.88 is: 11,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,791.36 : 14,877.12 = 8,393.88 : x
  2. Step 2: Convert to fraction form
    10,791.36/14,877.12 = 8,393.88/x
  3. Step 3: Cross multiply
    10,791.36x = 14,877.12 × 8,393.88
  4. Step 4: Simplify right side
    10,791.36x = 124,876,760.03
  5. Step 5: Solve for x
    x = 124,876,760.03/10,791.36
  6. Step 6: Final answer
    x = 11,571.92

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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.