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Finding the Fourth Proportional to 12,691.88, 19,043.18 and 6,841.65

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Solution

The fourth proportional to 12,691.88, 19,043.18 and 6,841.65 is: 10,265.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.88 : 19,043.18 = 6,841.65 : x
  2. Step 2: Convert to fraction form
    12,691.88/19,043.18 = 6,841.65/x
  3. Step 3: Cross multiply
    12,691.88x = 19,043.18 × 6,841.65
  4. Step 4: Simplify right side
    12,691.88x = 130,286,772.45
  5. Step 5: Solve for x
    x = 130,286,772.45/12,691.88
  6. Step 6: Final answer
    x = 10,265.36

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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.