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Finding the Fourth Proportional to 36,407.78, 54,611.67 and 20,814.47

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Solution

The fourth proportional to 36,407.78, 54,611.67 and 20,814.47 is: 31,221.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,407.78 : 54,611.67 = 20,814.47 : x
  2. Step 2: Convert to fraction form
    36,407.78/54,611.67 = 20,814.47/x
  3. Step 3: Cross multiply
    36,407.78x = 54,611.67 × 20,814.47
  4. Step 4: Simplify right side
    36,407.78x = 1,136,712,859.57
  5. Step 5: Solve for x
    x = 1,136,712,859.57/36,407.78
  6. Step 6: Final answer
    x = 31,221.70

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Similar ratio
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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.