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Finding the Fourth Proportional to 8,239.85, 12,357.21 and 2,974.17

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Solution

The fourth proportional to 8,239.85, 12,357.21 and 2,974.17 is: 4,460.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.85 : 12,357.21 = 2,974.17 : x
  2. Step 2: Convert to fraction form
    8,239.85/12,357.21 = 2,974.17/x
  3. Step 3: Cross multiply
    8,239.85x = 12,357.21 × 2,974.17
  4. Step 4: Simplify right side
    8,239.85x = 36,752,443.27
  5. Step 5: Solve for x
    x = 36,752,443.27/8,239.85
  6. Step 6: Final answer
    x = 4,460.33

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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.