Home / 8,116.40-12,169.38-3,186.56

Finding the Fourth Proportional to 8,116.40, 12,169.38 and 3,186.56

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Solution

The fourth proportional to 8,116.40, 12,169.38 and 3,186.56 is: 4,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,116.40 : 12,169.38 = 3,186.56 : x
  2. Step 2: Convert to fraction form
    8,116.40/12,169.38 = 3,186.56/x
  3. Step 3: Cross multiply
    8,116.40x = 12,169.38 × 3,186.56
  4. Step 4: Simplify right side
    8,116.40x = 38,778,459.53
  5. Step 5: Solve for x
    x = 38,778,459.53/8,116.40
  6. Step 6: Final answer
    x = 4,777.79

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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.