Home / 20,270.16-27,997.20-15,256.80

Finding the Fourth Proportional to 20,270.16, 27,997.20 and 15,256.80

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Solution

The fourth proportional to 20,270.16, 27,997.20 and 15,256.80 is: 21,072.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.16 : 27,997.20 = 15,256.80 : x
  2. Step 2: Convert to fraction form
    20,270.16/27,997.20 = 15,256.80/x
  3. Step 3: Cross multiply
    20,270.16x = 27,997.20 × 15,256.80
  4. Step 4: Simplify right side
    20,270.16x = 427,147,680.96
  5. Step 5: Solve for x
    x = 427,147,680.96/20,270.16
  6. Step 6: Final answer
    x = 21,072.73

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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.