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Finding the Fourth Proportional to 7,959.87, 11,939.81 and 6,114.29

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Solution

The fourth proportional to 7,959.87, 11,939.81 and 6,114.29 is: 9,171.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.87 : 11,939.81 = 6,114.29 : x
  2. Step 2: Convert to fraction form
    7,959.87/11,939.81 = 6,114.29/x
  3. Step 3: Cross multiply
    7,959.87x = 11,939.81 × 6,114.29
  4. Step 4: Simplify right side
    7,959.87x = 73,003,370.61
  5. Step 5: Solve for x
    x = 73,003,370.61/7,959.87
  6. Step 6: Final answer
    x = 9,171.43

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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.