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Finding the Fourth Proportional to 27,209.80, 40,764.30 and 15,488.20

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Solution

The fourth proportional to 27,209.80, 40,764.30 and 15,488.20 is: 23,203.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,209.80 : 40,764.30 = 15,488.20 : x
  2. Step 2: Convert to fraction form
    27,209.80/40,764.30 = 15,488.20/x
  3. Step 3: Cross multiply
    27,209.80x = 40,764.30 × 15,488.20
  4. Step 4: Simplify right side
    27,209.80x = 631,365,631.26
  5. Step 5: Solve for x
    x = 631,365,631.26/27,209.80
  6. Step 6: Final answer
    x = 23,203.61

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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.