Home / 20,336.70-30,481.65-7,851.20

Finding the Fourth Proportional to 20,336.70, 30,481.65 and 7,851.20

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Solution

The fourth proportional to 20,336.70, 30,481.65 and 7,851.20 is: 11,767.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,336.70 : 30,481.65 = 7,851.20 : x
  2. Step 2: Convert to fraction form
    20,336.70/30,481.65 = 7,851.20/x
  3. Step 3: Cross multiply
    20,336.70x = 30,481.65 × 7,851.20
  4. Step 4: Simplify right side
    20,336.70x = 239,317,378.07
  5. Step 5: Solve for x
    x = 239,317,378.07/20,336.70
  6. Step 6: Final answer
    x = 11,767.76

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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.