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Finding the Fourth Proportional to 8,559.70, 12,847.65 and 5,279.20

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Solution

The fourth proportional to 8,559.70, 12,847.65 and 5,279.20 is: 7,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,559.70 : 12,847.65 = 5,279.20 : x
  2. Step 2: Convert to fraction form
    8,559.70/12,847.65 = 5,279.20/x
  3. Step 3: Cross multiply
    8,559.70x = 12,847.65 × 5,279.20
  4. Step 4: Simplify right side
    8,559.70x = 67,825,313.88
  5. Step 5: Solve for x
    x = 67,825,313.88/8,559.70
  6. Step 6: Final answer
    x = 7,923.80

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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.