Home / 20,519.04-30,778.56-11,747.88

Finding the Fourth Proportional to 20,519.04, 30,778.56 and 11,747.88

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Solution

The fourth proportional to 20,519.04, 30,778.56 and 11,747.88 is: 17,621.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.04 : 30,778.56 = 11,747.88 : x
  2. Step 2: Convert to fraction form
    20,519.04/30,778.56 = 11,747.88/x
  3. Step 3: Cross multiply
    20,519.04x = 30,778.56 × 11,747.88
  4. Step 4: Simplify right side
    20,519.04x = 361,582,829.45
  5. Step 5: Solve for x
    x = 361,582,829.45/20,519.04
  6. Step 6: Final answer
    x = 17,621.82

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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.