Home / 18,438.56-25,456.40-12,471.20

Finding the Fourth Proportional to 18,438.56, 25,456.40 and 12,471.20

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Solution

The fourth proportional to 18,438.56, 25,456.40 and 12,471.20 is: 17,217.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.56 : 25,456.40 = 12,471.20 : x
  2. Step 2: Convert to fraction form
    18,438.56/25,456.40 = 12,471.20/x
  3. Step 3: Cross multiply
    18,438.56x = 25,456.40 × 12,471.20
  4. Step 4: Simplify right side
    18,438.56x = 317,471,855.68
  5. Step 5: Solve for x
    x = 317,471,855.68/18,438.56
  6. Step 6: Final answer
    x = 17,217.82

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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.