Home / 20,125.60-30,195.60-8,442.40

Finding the Fourth Proportional to 20,125.60, 30,195.60 and 8,442.40

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Solution

The fourth proportional to 20,125.60, 30,195.60 and 8,442.40 is: 12,666.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.60 : 30,195.60 = 8,442.40 : x
  2. Step 2: Convert to fraction form
    20,125.60/30,195.60 = 8,442.40/x
  3. Step 3: Cross multiply
    20,125.60x = 30,195.60 × 8,442.40
  4. Step 4: Simplify right side
    20,125.60x = 254,923,333.44
  5. Step 5: Solve for x
    x = 254,923,333.44/20,125.60
  6. Step 6: Final answer
    x = 12,666.62

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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.