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Finding the Fourth Proportional to 8,279.40, 12,404.70 and 5,356.20

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Solution

The fourth proportional to 8,279.40, 12,404.70 and 5,356.20 is: 8,024.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.40 : 12,404.70 = 5,356.20 : x
  2. Step 2: Convert to fraction form
    8,279.40/12,404.70 = 5,356.20/x
  3. Step 3: Cross multiply
    8,279.40x = 12,404.70 × 5,356.20
  4. Step 4: Simplify right side
    8,279.40x = 66,442,054.14
  5. Step 5: Solve for x
    x = 66,442,054.14/8,279.40
  6. Step 6: Final answer
    x = 8,024.98

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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.