Home / 11,881.18-17,821.70-3,561.20

Finding the Fourth Proportional to 11,881.18, 17,821.70 and 3,561.20

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Solution

The fourth proportional to 11,881.18, 17,821.70 and 3,561.20 is: 5,341.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,881.18 : 17,821.70 = 3,561.20 : x
  2. Step 2: Convert to fraction form
    11,881.18/17,821.70 = 3,561.20/x
  3. Step 3: Cross multiply
    11,881.18x = 17,821.70 × 3,561.20
  4. Step 4: Simplify right side
    11,881.18x = 63,466,638.04
  5. Step 5: Solve for x
    x = 63,466,638.04/11,881.18
  6. Step 6: Final answer
    x = 5,341.78

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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.