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Finding the Fourth Proportional to 20,173.10, 27,839.03 and 11,220.71

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Solution

The fourth proportional to 20,173.10, 27,839.03 and 11,220.71 is: 15,484.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,173.10 : 27,839.03 = 11,220.71 : x
  2. Step 2: Convert to fraction form
    20,173.10/27,839.03 = 11,220.71/x
  3. Step 3: Cross multiply
    20,173.10x = 27,839.03 × 11,220.71
  4. Step 4: Simplify right side
    20,173.10x = 312,373,487.01
  5. Step 5: Solve for x
    x = 312,373,487.01/20,173.10
  6. Step 6: Final answer
    x = 15,484.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.