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Finding the Fourth Proportional to 27,215.40, 40,815.39 and 10,571.88

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Solution

The fourth proportional to 27,215.40, 40,815.39 and 10,571.88 is: 15,854.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,215.40 : 40,815.39 = 10,571.88 : x
  2. Step 2: Convert to fraction form
    27,215.40/40,815.39 = 10,571.88/x
  3. Step 3: Cross multiply
    27,215.40x = 40,815.39 × 10,571.88
  4. Step 4: Simplify right side
    27,215.40x = 431,495,405.23
  5. Step 5: Solve for x
    x = 431,495,405.23/27,215.40
  6. Step 6: Final answer
    x = 15,854.83

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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.