Home / 3,891.31-5,371.55-2,631.76

Finding the Fourth Proportional to 3,891.31, 5,371.55 and 2,631.76

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Solution

The fourth proportional to 3,891.31, 5,371.55 and 2,631.76 is: 3,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.31 : 5,371.55 = 2,631.76 : x
  2. Step 2: Convert to fraction form
    3,891.31/5,371.55 = 2,631.76/x
  3. Step 3: Cross multiply
    3,891.31x = 5,371.55 × 2,631.76
  4. Step 4: Simplify right side
    3,891.31x = 14,136,613.71
  5. Step 5: Solve for x
    x = 14,136,613.71/3,891.31
  6. Step 6: Final answer
    x = 3,632.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.