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Finding the Fourth Proportional to 8,276.24, 12,418.20 and 8,145.20

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Solution

The fourth proportional to 8,276.24, 12,418.20 and 8,145.20 is: 12,221.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,276.24 : 12,418.20 = 8,145.20 : x
  2. Step 2: Convert to fraction form
    8,276.24/12,418.20 = 8,145.20/x
  3. Step 3: Cross multiply
    8,276.24x = 12,418.20 × 8,145.20
  4. Step 4: Simplify right side
    8,276.24x = 101,148,722.64
  5. Step 5: Solve for x
    x = 101,148,722.64/8,276.24
  6. Step 6: Final answer
    x = 12,221.58

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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.