Home / 20,105.90-30,160.65-8,416.70

Finding the Fourth Proportional to 20,105.90, 30,160.65 and 8,416.70

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Solution

The fourth proportional to 20,105.90, 30,160.65 and 8,416.70 is: 12,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.90 : 30,160.65 = 8,416.70 : x
  2. Step 2: Convert to fraction form
    20,105.90/30,160.65 = 8,416.70/x
  3. Step 3: Cross multiply
    20,105.90x = 30,160.65 × 8,416.70
  4. Step 4: Simplify right side
    20,105.90x = 253,853,142.86
  5. Step 5: Solve for x
    x = 253,853,142.86/20,105.90
  6. Step 6: Final answer
    x = 12,625.80

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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.