Home / 3,439.90-5,127.40-3,115.90

Finding the Fourth Proportional to 3,439.90, 5,127.40 and 3,115.90

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Solution

The fourth proportional to 3,439.90, 5,127.40 and 3,115.90 is: 4,644.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.90 : 5,127.40 = 3,115.90 : x
  2. Step 2: Convert to fraction form
    3,439.90/5,127.40 = 3,115.90/x
  3. Step 3: Cross multiply
    3,439.90x = 5,127.40 × 3,115.90
  4. Step 4: Simplify right side
    3,439.90x = 15,976,465.66
  5. Step 5: Solve for x
    x = 15,976,465.66/3,439.90
  6. Step 6: Final answer
    x = 4,644.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.