Home / 13,581.16-20,370.76-4,220.96

Finding the Fourth Proportional to 13,581.16, 20,370.76 and 4,220.96

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Solution

The fourth proportional to 13,581.16, 20,370.76 and 4,220.96 is: 6,331.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.16 : 20,370.76 = 4,220.96 : x
  2. Step 2: Convert to fraction form
    13,581.16/20,370.76 = 4,220.96/x
  3. Step 3: Cross multiply
    13,581.16x = 20,370.76 × 4,220.96
  4. Step 4: Simplify right side
    13,581.16x = 85,984,163.13
  5. Step 5: Solve for x
    x = 85,984,163.13/13,581.16
  6. Step 6: Final answer
    x = 6,331.14

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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.