Home / 20,126.20-30,156.90-10,250.68

Finding the Fourth Proportional to 20,126.20, 30,156.90 and 10,250.68

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Solution

The fourth proportional to 20,126.20, 30,156.90 and 10,250.68 is: 15,359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.20 : 30,156.90 = 10,250.68 : x
  2. Step 2: Convert to fraction form
    20,126.20/30,156.90 = 10,250.68/x
  3. Step 3: Cross multiply
    20,126.20x = 30,156.90 × 10,250.68
  4. Step 4: Simplify right side
    20,126.20x = 309,128,731.69
  5. Step 5: Solve for x
    x = 309,128,731.69/20,126.20
  6. Step 6: Final answer
    x = 15,359.52

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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.