Home / 5,638.56-7,781.09-3,120.52

Finding the Fourth Proportional to 5,638.56, 7,781.09 and 3,120.52

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Solution

The fourth proportional to 5,638.56, 7,781.09 and 3,120.52 is: 4,306.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.56 : 7,781.09 = 3,120.52 : x
  2. Step 2: Convert to fraction form
    5,638.56/7,781.09 = 3,120.52/x
  3. Step 3: Cross multiply
    5,638.56x = 7,781.09 × 3,120.52
  4. Step 4: Simplify right side
    5,638.56x = 24,281,064.49
  5. Step 5: Solve for x
    x = 24,281,064.49/5,638.56
  6. Step 6: Final answer
    x = 4,306.25

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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.