Home / 11,221.20-15,491.70-7,449.46

Finding the Fourth Proportional to 11,221.20, 15,491.70 and 7,449.46

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Solution

The fourth proportional to 11,221.20, 15,491.70 and 7,449.46 is: 10,284.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,221.20 : 15,491.70 = 7,449.46 : x
  2. Step 2: Convert to fraction form
    11,221.20/15,491.70 = 7,449.46/x
  3. Step 3: Cross multiply
    11,221.20x = 15,491.70 × 7,449.46
  4. Step 4: Simplify right side
    11,221.20x = 115,404,760.75
  5. Step 5: Solve for x
    x = 115,404,760.75/11,221.20
  6. Step 6: Final answer
    x = 10,284.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.