Home / 8,120.96-12,180-2,926.88

Finding the Fourth Proportional to 8,120.96, 12,180 and 2,926.88

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Solution

The fourth proportional to 8,120.96, 12,180 and 2,926.88 is: 4,389.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.96 : 12,180 = 2,926.88 : x
  2. Step 2: Convert to fraction form
    8,120.96/12,180 = 2,926.88/x
  3. Step 3: Cross multiply
    8,120.96x = 12,180 × 2,926.88
  4. Step 4: Simplify right side
    8,120.96x = 35,649,398.40
  5. Step 5: Solve for x
    x = 35,649,398.40/8,120.96
  6. Step 6: Final answer
    x = 4,389.80

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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.