Home / 20,278.24-27,977.84-11,778.70

Finding the Fourth Proportional to 20,278.24, 27,977.84 and 11,778.70

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Solution

The fourth proportional to 20,278.24, 27,977.84 and 11,778.70 is: 16,251.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.24 : 27,977.84 = 11,778.70 : x
  2. Step 2: Convert to fraction form
    20,278.24/27,977.84 = 11,778.70/x
  3. Step 3: Cross multiply
    20,278.24x = 27,977.84 × 11,778.70
  4. Step 4: Simplify right side
    20,278.24x = 329,542,719.52
  5. Step 5: Solve for x
    x = 329,542,719.52/20,278.24
  6. Step 6: Final answer
    x = 16,251.05

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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.