Home / 28,129.32-42,194.18-8,408.05

Finding the Fourth Proportional to 28,129.32, 42,194.18 and 8,408.05

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Solution

The fourth proportional to 28,129.32, 42,194.18 and 8,408.05 is: 12,612.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.32 : 42,194.18 = 8,408.05 : x
  2. Step 2: Convert to fraction form
    28,129.32/42,194.18 = 8,408.05/x
  3. Step 3: Cross multiply
    28,129.32x = 42,194.18 × 8,408.05
  4. Step 4: Simplify right side
    28,129.32x = 354,770,690.68
  5. Step 5: Solve for x
    x = 354,770,690.68/28,129.32
  6. Step 6: Final answer
    x = 12,612.13

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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.