Home / 20,123.20-27,769.76-11,170.68

Finding the Fourth Proportional to 20,123.20, 27,769.76 and 11,170.68

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Solution

The fourth proportional to 20,123.20, 27,769.76 and 11,170.68 is: 15,415.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.20 : 27,769.76 = 11,170.68 : x
  2. Step 2: Convert to fraction form
    20,123.20/27,769.76 = 11,170.68/x
  3. Step 3: Cross multiply
    20,123.20x = 27,769.76 × 11,170.68
  4. Step 4: Simplify right side
    20,123.20x = 310,207,102.64
  5. Step 5: Solve for x
    x = 310,207,102.64/20,123.20
  6. Step 6: Final answer
    x = 15,415.40

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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.