Home / 28,078.30-38,754.57-18,519.90

Finding the Fourth Proportional to 28,078.30, 38,754.57 and 18,519.90

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Solution

The fourth proportional to 28,078.30, 38,754.57 and 18,519.90 is: 25,561.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.30 : 38,754.57 = 18,519.90 : x
  2. Step 2: Convert to fraction form
    28,078.30/38,754.57 = 18,519.90/x
  3. Step 3: Cross multiply
    28,078.30x = 38,754.57 × 18,519.90
  4. Step 4: Simplify right side
    28,078.30x = 717,730,760.94
  5. Step 5: Solve for x
    x = 717,730,760.94/28,078.30
  6. Step 6: Final answer
    x = 25,561.76

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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.