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Finding the Fourth Proportional to 27,332.80, 40,948.80 and 15,611.20

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Solution

The fourth proportional to 27,332.80, 40,948.80 and 15,611.20 is: 23,388.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,332.80 : 40,948.80 = 15,611.20 : x
  2. Step 2: Convert to fraction form
    27,332.80/40,948.80 = 15,611.20/x
  3. Step 3: Cross multiply
    27,332.80x = 40,948.80 × 15,611.20
  4. Step 4: Simplify right side
    27,332.80x = 639,259,906.56
  5. Step 5: Solve for x
    x = 639,259,906.56/27,332.80
  6. Step 6: Final answer
    x = 23,388.01

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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.