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Finding the Fourth Proportional to 8,761.94, 13,139.69 and 6,891.48

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Solution

The fourth proportional to 8,761.94, 13,139.69 and 6,891.48 is: 10,334.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.94 : 13,139.69 = 6,891.48 : x
  2. Step 2: Convert to fraction form
    8,761.94/13,139.69 = 6,891.48/x
  3. Step 3: Cross multiply
    8,761.94x = 13,139.69 × 6,891.48
  4. Step 4: Simplify right side
    8,761.94x = 90,551,876.38
  5. Step 5: Solve for x
    x = 90,551,876.38/8,761.94
  6. Step 6: Final answer
    x = 10,334.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.