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Finding the Fourth Proportional to 7,348.80, 11,021.28 and 2,729.28

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Solution

The fourth proportional to 7,348.80, 11,021.28 and 2,729.28 is: 4,093.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,348.80 : 11,021.28 = 2,729.28 : x
  2. Step 2: Convert to fraction form
    7,348.80/11,021.28 = 2,729.28/x
  3. Step 3: Cross multiply
    7,348.80x = 11,021.28 × 2,729.28
  4. Step 4: Simplify right side
    7,348.80x = 30,080,159.08
  5. Step 5: Solve for x
    x = 30,080,159.08/7,348.80
  6. Step 6: Final answer
    x = 4,093.21

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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.