Home / 8,120.40-12,181.82-2,925.88

Finding the Fourth Proportional to 8,120.40, 12,181.82 and 2,925.88

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Solution

The fourth proportional to 8,120.40, 12,181.82 and 2,925.88 is: 4,389.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.40 : 12,181.82 = 2,925.88 : x
  2. Step 2: Convert to fraction form
    8,120.40/12,181.82 = 2,925.88/x
  3. Step 3: Cross multiply
    8,120.40x = 12,181.82 × 2,925.88
  4. Step 4: Simplify right side
    8,120.40x = 35,642,543.50
  5. Step 5: Solve for x
    x = 35,642,543.50/8,120.40
  6. Step 6: Final answer
    x = 4,389.26

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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.