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Finding the Fourth Proportional to 7,279.80, 10,926.90 and 3,586.20

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Solution

The fourth proportional to 7,279.80, 10,926.90 and 3,586.20 is: 5,382.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.80 : 10,926.90 = 3,586.20 : x
  2. Step 2: Convert to fraction form
    7,279.80/10,926.90 = 3,586.20/x
  3. Step 3: Cross multiply
    7,279.80x = 10,926.90 × 3,586.20
  4. Step 4: Simplify right side
    7,279.80x = 39,186,048.78
  5. Step 5: Solve for x
    x = 39,186,048.78/7,279.80
  6. Step 6: Final answer
    x = 5,382.85

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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.