Home / 20,257.22-27,947.13-12,690.38

Finding the Fourth Proportional to 20,257.22, 27,947.13 and 12,690.38

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Solution

The fourth proportional to 20,257.22, 27,947.13 and 12,690.38 is: 17,507.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.22 : 27,947.13 = 12,690.38 : x
  2. Step 2: Convert to fraction form
    20,257.22/27,947.13 = 12,690.38/x
  3. Step 3: Cross multiply
    20,257.22x = 27,947.13 × 12,690.38
  4. Step 4: Simplify right side
    20,257.22x = 354,659,559.87
  5. Step 5: Solve for x
    x = 354,659,559.87/20,257.22
  6. Step 6: Final answer
    x = 17,507.81

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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.