Home / 20,081.30-30,116.55-8,392.10

Finding the Fourth Proportional to 20,081.30, 30,116.55 and 8,392.10

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Solution

The fourth proportional to 20,081.30, 30,116.55 and 8,392.10 is: 12,585.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.30 : 30,116.55 = 8,392.10 : x
  2. Step 2: Convert to fraction form
    20,081.30/30,116.55 = 8,392.10/x
  3. Step 3: Cross multiply
    20,081.30x = 30,116.55 × 8,392.10
  4. Step 4: Simplify right side
    20,081.30x = 252,741,099.26
  5. Step 5: Solve for x
    x = 252,741,099.26/20,081.30
  6. Step 6: Final answer
    x = 12,585.89

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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.