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Finding the Fourth Proportional to 13,611.92, 20,407.50 and 6,211.22

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Solution

The fourth proportional to 13,611.92, 20,407.50 and 6,211.22 is: 9,312.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.92 : 20,407.50 = 6,211.22 : x
  2. Step 2: Convert to fraction form
    13,611.92/20,407.50 = 6,211.22/x
  3. Step 3: Cross multiply
    13,611.92x = 20,407.50 × 6,211.22
  4. Step 4: Simplify right side
    13,611.92x = 126,755,472.15
  5. Step 5: Solve for x
    x = 126,755,472.15/13,611.92
  6. Step 6: Final answer
    x = 9,312.09

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1.5x scale

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.