Home / 3,125.95-4,687.18-2,139.87

Finding the Fourth Proportional to 3,125.95, 4,687.18 and 2,139.87

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Solution

The fourth proportional to 3,125.95, 4,687.18 and 2,139.87 is: 3,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.95 : 4,687.18 = 2,139.87 : x
  2. Step 2: Convert to fraction form
    3,125.95/4,687.18 = 2,139.87/x
  3. Step 3: Cross multiply
    3,125.95x = 4,687.18 × 2,139.87
  4. Step 4: Simplify right side
    3,125.95x = 10,029,955.87
  5. Step 5: Solve for x
    x = 10,029,955.87/3,125.95
  6. Step 6: Final answer
    x = 3,208.61

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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.