Home / 5,638.97-7,781.67-3,120.93

Finding the Fourth Proportional to 5,638.97, 7,781.67 and 3,120.93

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Solution

The fourth proportional to 5,638.97, 7,781.67 and 3,120.93 is: 4,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.97 : 7,781.67 = 3,120.93 : x
  2. Step 2: Convert to fraction form
    5,638.97/7,781.67 = 3,120.93/x
  3. Step 3: Cross multiply
    5,638.97x = 7,781.67 × 3,120.93
  4. Step 4: Simplify right side
    5,638.97x = 24,286,047.35
  5. Step 5: Solve for x
    x = 24,286,047.35/5,638.97
  6. Step 6: Final answer
    x = 4,306.82

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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.