Home / 28,380.36-42,565.68-8,115.72

Finding the Fourth Proportional to 28,380.36, 42,565.68 and 8,115.72

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Solution

The fourth proportional to 28,380.36, 42,565.68 and 8,115.72 is: 12,172.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.36 : 42,565.68 = 8,115.72 : x
  2. Step 2: Convert to fraction form
    28,380.36/42,565.68 = 8,115.72/x
  3. Step 3: Cross multiply
    28,380.36x = 42,565.68 × 8,115.72
  4. Step 4: Simplify right side
    28,380.36x = 345,451,140.49
  5. Step 5: Solve for x
    x = 345,451,140.49/28,380.36
  6. Step 6: Final answer
    x = 12,172.19

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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.