Home / 20,251-27,947.46-11,870.20

Finding the Fourth Proportional to 20,251, 27,947.46 and 11,870.20

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Solution

The fourth proportional to 20,251, 27,947.46 and 11,870.20 is: 16,381.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,251 : 27,947.46 = 11,870.20 : x
  2. Step 2: Convert to fraction form
    20,251/27,947.46 = 11,870.20/x
  3. Step 3: Cross multiply
    20,251x = 27,947.46 × 11,870.20
  4. Step 4: Simplify right side
    20,251x = 331,741,939.69
  5. Step 5: Solve for x
    x = 331,741,939.69/20,251
  6. Step 6: Final answer
    x = 16,381.51

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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.