Home / 20,100.72-30,169.76-10,247.40

Finding the Fourth Proportional to 20,100.72, 30,169.76 and 10,247.40

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Solution

The fourth proportional to 20,100.72, 30,169.76 and 10,247.40 is: 15,380.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.72 : 30,169.76 = 10,247.40 : x
  2. Step 2: Convert to fraction form
    20,100.72/30,169.76 = 10,247.40/x
  3. Step 3: Cross multiply
    20,100.72x = 30,169.76 × 10,247.40
  4. Step 4: Simplify right side
    20,100.72x = 309,161,598.62
  5. Step 5: Solve for x
    x = 309,161,598.62/20,100.72
  6. Step 6: Final answer
    x = 15,380.62

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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.