Home / 10,872.40-16,309.96-3,081.20

Finding the Fourth Proportional to 10,872.40, 16,309.96 and 3,081.20

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Solution

The fourth proportional to 10,872.40, 16,309.96 and 3,081.20 is: 4,622.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,872.40 : 16,309.96 = 3,081.20 : x
  2. Step 2: Convert to fraction form
    10,872.40/16,309.96 = 3,081.20/x
  3. Step 3: Cross multiply
    10,872.40x = 16,309.96 × 3,081.20
  4. Step 4: Simplify right side
    10,872.40x = 50,254,248.75
  5. Step 5: Solve for x
    x = 50,254,248.75/10,872.40
  6. Step 6: Final answer
    x = 4,622.19

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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.