Home / 2,686.32-3,706.10-1,979.85

Finding the Fourth Proportional to 2,686.32, 3,706.10 and 1,979.85

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Solution

The fourth proportional to 2,686.32, 3,706.10 and 1,979.85 is: 2,731.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.32 : 3,706.10 = 1,979.85 : x
  2. Step 2: Convert to fraction form
    2,686.32/3,706.10 = 1,979.85/x
  3. Step 3: Cross multiply
    2,686.32x = 3,706.10 × 1,979.85
  4. Step 4: Simplify right side
    2,686.32x = 7,337,493.66
  5. Step 5: Solve for x
    x = 7,337,493.66/2,686.32
  6. Step 6: Final answer
    x = 2,731.43

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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.