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Finding the Fourth Proportional to 7,891.68, 11,844.72 and 3,998.76

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Solution

The fourth proportional to 7,891.68, 11,844.72 and 3,998.76 is: 6,001.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.68 : 11,844.72 = 3,998.76 : x
  2. Step 2: Convert to fraction form
    7,891.68/11,844.72 = 3,998.76/x
  3. Step 3: Cross multiply
    7,891.68x = 11,844.72 × 3,998.76
  4. Step 4: Simplify right side
    7,891.68x = 47,364,192.55
  5. Step 5: Solve for x
    x = 47,364,192.55/7,891.68
  6. Step 6: Final answer
    x = 6,001.79

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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.