Home / 20,079.90-30,138.36-10,226.28

Finding the Fourth Proportional to 20,079.90, 30,138.36 and 10,226.28

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Solution

The fourth proportional to 20,079.90, 30,138.36 and 10,226.28 is: 15,348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.90 : 30,138.36 = 10,226.28 : x
  2. Step 2: Convert to fraction form
    20,079.90/30,138.36 = 10,226.28/x
  3. Step 3: Cross multiply
    20,079.90x = 30,138.36 × 10,226.28
  4. Step 4: Simplify right side
    20,079.90x = 308,203,308.10
  5. Step 5: Solve for x
    x = 308,203,308.10/20,079.90
  6. Step 6: Final answer
    x = 15,348.85

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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.