Home / 3,149.40-4,724.10-3,127.80

Finding the Fourth Proportional to 3,149.40, 4,724.10 and 3,127.80

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Solution

The fourth proportional to 3,149.40, 4,724.10 and 3,127.80 is: 4,691.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.40 : 4,724.10 = 3,127.80 : x
  2. Step 2: Convert to fraction form
    3,149.40/4,724.10 = 3,127.80/x
  3. Step 3: Cross multiply
    3,149.40x = 4,724.10 × 3,127.80
  4. Step 4: Simplify right side
    3,149.40x = 14,776,039.98
  5. Step 5: Solve for x
    x = 14,776,039.98/3,149.40
  6. Step 6: Final answer
    x = 4,691.70

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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.