Home / 3,121.29-4,685.11-1,562.43

Finding the Fourth Proportional to 3,121.29, 4,685.11 and 1,562.43

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Solution

The fourth proportional to 3,121.29, 4,685.11 and 1,562.43 is: 2,345.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.29 : 4,685.11 = 1,562.43 : x
  2. Step 2: Convert to fraction form
    3,121.29/4,685.11 = 1,562.43/x
  3. Step 3: Cross multiply
    3,121.29x = 4,685.11 × 1,562.43
  4. Step 4: Simplify right side
    3,121.29x = 7,320,156.42
  5. Step 5: Solve for x
    x = 7,320,156.42/3,121.29
  6. Step 6: Final answer
    x = 2,345.23

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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.