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Finding the Fourth Proportional to 7,221.28, 10,836.80 and 3,525.28

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Solution

The fourth proportional to 7,221.28, 10,836.80 and 3,525.28 is: 5,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.28 : 10,836.80 = 3,525.28 : x
  2. Step 2: Convert to fraction form
    7,221.28/10,836.80 = 3,525.28/x
  3. Step 3: Cross multiply
    7,221.28x = 10,836.80 × 3,525.28
  4. Step 4: Simplify right side
    7,221.28x = 38,202,754.30
  5. Step 5: Solve for x
    x = 38,202,754.30/7,221.28
  6. Step 6: Final answer
    x = 5,290.30

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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.