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Finding the Fourth Proportional to 7,291.20, 10,936.80 and 2,026.20

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Solution

The fourth proportional to 7,291.20, 10,936.80 and 2,026.20 is: 3,039.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,291.20 : 10,936.80 = 2,026.20 : x
  2. Step 2: Convert to fraction form
    7,291.20/10,936.80 = 2,026.20/x
  3. Step 3: Cross multiply
    7,291.20x = 10,936.80 × 2,026.20
  4. Step 4: Simplify right side
    7,291.20x = 22,160,144.16
  5. Step 5: Solve for x
    x = 22,160,144.16/7,291.20
  6. Step 6: Final answer
    x = 3,039.30

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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.