Home / 20,123.19-27,769.50-11,170.71

Finding the Fourth Proportional to 20,123.19, 27,769.50 and 11,170.71

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Solution

The fourth proportional to 20,123.19, 27,769.50 and 11,170.71 is: 15,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.19 : 27,769.50 = 11,170.71 : x
  2. Step 2: Convert to fraction form
    20,123.19/27,769.50 = 11,170.71/x
  3. Step 3: Cross multiply
    20,123.19x = 27,769.50 × 11,170.71
  4. Step 4: Simplify right side
    20,123.19x = 310,205,031.35
  5. Step 5: Solve for x
    x = 310,205,031.35/20,123.19
  6. Step 6: Final answer
    x = 15,415.30

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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.