Home / 10,220.56-15,331.20-3,981.04

Finding the Fourth Proportional to 10,220.56, 15,331.20 and 3,981.04

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Solution

The fourth proportional to 10,220.56, 15,331.20 and 3,981.04 is: 5,971.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,220.56 : 15,331.20 = 3,981.04 : x
  2. Step 2: Convert to fraction form
    10,220.56/15,331.20 = 3,981.04/x
  3. Step 3: Cross multiply
    10,220.56x = 15,331.20 × 3,981.04
  4. Step 4: Simplify right side
    10,220.56x = 61,034,120.45
  5. Step 5: Solve for x
    x = 61,034,120.45/10,220.56
  6. Step 6: Final answer
    x = 5,971.70

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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.