Home / 12,891.78-19,337.69-3,531.88

Finding the Fourth Proportional to 12,891.78, 19,337.69 and 3,531.88

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Solution

The fourth proportional to 12,891.78, 19,337.69 and 3,531.88 is: 5,297.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.78 : 19,337.69 = 3,531.88 : x
  2. Step 2: Convert to fraction form
    12,891.78/19,337.69 = 3,531.88/x
  3. Step 3: Cross multiply
    12,891.78x = 19,337.69 × 3,531.88
  4. Step 4: Simplify right side
    12,891.78x = 68,298,426.94
  5. Step 5: Solve for x
    x = 68,298,426.94/12,891.78
  6. Step 6: Final answer
    x = 5,297.83

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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.