Home / 28,170.20-42,249.90-8,449.40

Finding the Fourth Proportional to 28,170.20, 42,249.90 and 8,449.40

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Solution

The fourth proportional to 28,170.20, 42,249.90 and 8,449.40 is: 12,672.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.20 : 42,249.90 = 8,449.40 : x
  2. Step 2: Convert to fraction form
    28,170.20/42,249.90 = 8,449.40/x
  3. Step 3: Cross multiply
    28,170.20x = 42,249.90 × 8,449.40
  4. Step 4: Simplify right side
    28,170.20x = 356,986,305.06
  5. Step 5: Solve for x
    x = 356,986,305.06/28,170.20
  6. Step 6: Final answer
    x = 12,672.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.