Home / 6,423.20-9,626.70-3,129.20

Finding the Fourth Proportional to 6,423.20, 9,626.70 and 3,129.20

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Solution

The fourth proportional to 6,423.20, 9,626.70 and 3,129.20 is: 4,689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,423.20 : 9,626.70 = 3,129.20 : x
  2. Step 2: Convert to fraction form
    6,423.20/9,626.70 = 3,129.20/x
  3. Step 3: Cross multiply
    6,423.20x = 9,626.70 × 3,129.20
  4. Step 4: Simplify right side
    6,423.20x = 30,123,869.64
  5. Step 5: Solve for x
    x = 30,123,869.64/6,423.20
  6. Step 6: Final answer
    x = 4,689.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.