Home / 20,100.48-30,151.80-5,309.88

Finding the Fourth Proportional to 20,100.48, 30,151.80 and 5,309.88

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Solution

The fourth proportional to 20,100.48, 30,151.80 and 5,309.88 is: 7,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.48 : 30,151.80 = 5,309.88 : x
  2. Step 2: Convert to fraction form
    20,100.48/30,151.80 = 5,309.88/x
  3. Step 3: Cross multiply
    20,100.48x = 30,151.80 × 5,309.88
  4. Step 4: Simplify right side
    20,100.48x = 160,102,439.78
  5. Step 5: Solve for x
    x = 160,102,439.78/20,100.48
  6. Step 6: Final answer
    x = 7,965.11

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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.