Home / 20,077.20-27,704.10-11,123.40

Finding the Fourth Proportional to 20,077.20, 27,704.10 and 11,123.40

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Solution

The fourth proportional to 20,077.20, 27,704.10 and 11,123.40 is: 15,348.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,077.20 : 27,704.10 = 11,123.40 : x
  2. Step 2: Convert to fraction form
    20,077.20/27,704.10 = 11,123.40/x
  3. Step 3: Cross multiply
    20,077.20x = 27,704.10 × 11,123.40
  4. Step 4: Simplify right side
    20,077.20x = 308,163,785.94
  5. Step 5: Solve for x
    x = 308,163,785.94/20,077.20
  6. Step 6: Final answer
    x = 15,348.94

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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.