Home / 5,638.21-7,780.54-3,120.43

Finding the Fourth Proportional to 5,638.21, 7,780.54 and 3,120.43

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Solution

The fourth proportional to 5,638.21, 7,780.54 and 3,120.43 is: 4,306.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.21 : 7,780.54 = 3,120.43 : x
  2. Step 2: Convert to fraction form
    5,638.21/7,780.54 = 3,120.43/x
  3. Step 3: Cross multiply
    5,638.21x = 7,780.54 × 3,120.43
  4. Step 4: Simplify right side
    5,638.21x = 24,278,624.61
  5. Step 5: Solve for x
    x = 24,278,624.61/5,638.21
  6. Step 6: Final answer
    x = 4,306.09

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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.