Home / 7,126.46-9,834.45-3,939.80

Finding the Fourth Proportional to 7,126.46, 9,834.45 and 3,939.80

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Solution

The fourth proportional to 7,126.46, 9,834.45 and 3,939.80 is: 5,436.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,126.46 : 9,834.45 = 3,939.80 : x
  2. Step 2: Convert to fraction form
    7,126.46/9,834.45 = 3,939.80/x
  3. Step 3: Cross multiply
    7,126.46x = 9,834.45 × 3,939.80
  4. Step 4: Simplify right side
    7,126.46x = 38,745,766.11
  5. Step 5: Solve for x
    x = 38,745,766.11/7,126.46
  6. Step 6: Final answer
    x = 5,436.89

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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.