Home / 20,431.38-30,631.85-8,588.62

Finding the Fourth Proportional to 20,431.38, 30,631.85 and 8,588.62

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Solution

The fourth proportional to 20,431.38, 30,631.85 and 8,588.62 is: 12,876.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.38 : 30,631.85 = 8,588.62 : x
  2. Step 2: Convert to fraction form
    20,431.38/30,631.85 = 8,588.62/x
  3. Step 3: Cross multiply
    20,431.38x = 30,631.85 × 8,588.62
  4. Step 4: Simplify right side
    20,431.38x = 263,085,319.55
  5. Step 5: Solve for x
    x = 263,085,319.55/20,431.38
  6. Step 6: Final answer
    x = 12,876.53

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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.