Home / 20,108.90-30,174.15-8,423.30

Finding the Fourth Proportional to 20,108.90, 30,174.15 and 8,423.30

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Solution

The fourth proportional to 20,108.90, 30,174.15 and 8,423.30 is: 12,639.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.90 : 30,174.15 = 8,423.30 : x
  2. Step 2: Convert to fraction form
    20,108.90/30,174.15 = 8,423.30/x
  3. Step 3: Cross multiply
    20,108.90x = 30,174.15 × 8,423.30
  4. Step 4: Simplify right side
    20,108.90x = 254,165,917.70
  5. Step 5: Solve for x
    x = 254,165,917.70/20,108.90
  6. Step 6: Final answer
    x = 12,639.47

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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.