Home / 5,638.55-7,780.70-3,120.62

Finding the Fourth Proportional to 5,638.55, 7,780.70 and 3,120.62

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Solution

The fourth proportional to 5,638.55, 7,780.70 and 3,120.62 is: 4,306.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.55 : 7,780.70 = 3,120.62 : x
  2. Step 2: Convert to fraction form
    5,638.55/7,780.70 = 3,120.62/x
  3. Step 3: Cross multiply
    5,638.55x = 7,780.70 × 3,120.62
  4. Step 4: Simplify right side
    5,638.55x = 24,280,553.53
  5. Step 5: Solve for x
    x = 24,280,553.53/5,638.55
  6. Step 6: Final answer
    x = 4,306.17

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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.