Home / 20,590.60-30,865.10-8,119.40

Finding the Fourth Proportional to 20,590.60, 30,865.10 and 8,119.40

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Solution

The fourth proportional to 20,590.60, 30,865.10 and 8,119.40 is: 12,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.60 : 30,865.10 = 8,119.40 : x
  2. Step 2: Convert to fraction form
    20,590.60/30,865.10 = 8,119.40/x
  3. Step 3: Cross multiply
    20,590.60x = 30,865.10 × 8,119.40
  4. Step 4: Simplify right side
    20,590.60x = 250,606,092.94
  5. Step 5: Solve for x
    x = 250,606,092.94/20,590.60
  6. Step 6: Final answer
    x = 12,170.90

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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.