Home / 8,121.60-12,182.40-6,481.35

Finding the Fourth Proportional to 8,121.60, 12,182.40 and 6,481.35

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Solution

The fourth proportional to 8,121.60, 12,182.40 and 6,481.35 is: 9,722.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.60 : 12,182.40 = 6,481.35 : x
  2. Step 2: Convert to fraction form
    8,121.60/12,182.40 = 6,481.35/x
  3. Step 3: Cross multiply
    8,121.60x = 12,182.40 × 6,481.35
  4. Step 4: Simplify right side
    8,121.60x = 78,958,398.24
  5. Step 5: Solve for x
    x = 78,958,398.24/8,121.60
  6. Step 6: Final answer
    x = 9,722.03

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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.