Home / 3,127.20-4,314.24-1,949.76

Finding the Fourth Proportional to 3,127.20, 4,314.24 and 1,949.76

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Solution

The fourth proportional to 3,127.20, 4,314.24 and 1,949.76 is: 2,689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.20 : 4,314.24 = 1,949.76 : x
  2. Step 2: Convert to fraction form
    3,127.20/4,314.24 = 1,949.76/x
  3. Step 3: Cross multiply
    3,127.20x = 4,314.24 × 1,949.76
  4. Step 4: Simplify right side
    3,127.20x = 8,411,732.58
  5. Step 5: Solve for x
    x = 8,411,732.58/3,127.20
  6. Step 6: Final answer
    x = 2,689.86

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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.