Home / 5,638.82-7,780.97-3,120.53

Finding the Fourth Proportional to 5,638.82, 7,780.97 and 3,120.53

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Solution

The fourth proportional to 5,638.82, 7,780.97 and 3,120.53 is: 4,305.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.82 : 7,780.97 = 3,120.53 : x
  2. Step 2: Convert to fraction form
    5,638.82/7,780.97 = 3,120.53/x
  3. Step 3: Cross multiply
    5,638.82x = 7,780.97 × 3,120.53
  4. Step 4: Simplify right side
    5,638.82x = 24,280,695.81
  5. Step 5: Solve for x
    x = 24,280,695.81/5,638.82
  6. Step 6: Final answer
    x = 4,305.99

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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.