Home / 20,122.76-27,769.56-11,171.10

Finding the Fourth Proportional to 20,122.76, 27,769.56 and 11,171.10

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Solution

The fourth proportional to 20,122.76, 27,769.56 and 11,171.10 is: 15,416.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.76 : 27,769.56 = 11,171.10 : x
  2. Step 2: Convert to fraction form
    20,122.76/27,769.56 = 11,171.10/x
  3. Step 3: Cross multiply
    20,122.76x = 27,769.56 × 11,171.10
  4. Step 4: Simplify right side
    20,122.76x = 310,216,531.72
  5. Step 5: Solve for x
    x = 310,216,531.72/20,122.76
  6. Step 6: Final answer
    x = 15,416.20

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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.