Home / 5,639.33-7,781.67-3,121.04

Finding the Fourth Proportional to 5,639.33, 7,781.67 and 3,121.04

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Solution

The fourth proportional to 5,639.33, 7,781.67 and 3,121.04 is: 4,306.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.33 : 7,781.67 = 3,121.04 : x
  2. Step 2: Convert to fraction form
    5,639.33/7,781.67 = 3,121.04/x
  3. Step 3: Cross multiply
    5,639.33x = 7,781.67 × 3,121.04
  4. Step 4: Simplify right side
    5,639.33x = 24,286,922.79
  5. Step 5: Solve for x
    x = 24,286,922.79/5,639.33
  6. Step 6: Final answer
    x = 4,306.70

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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.