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Finding the Fourth Proportional to 15,212.44, 20,992.71 and 8,497.90

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Solution

The fourth proportional to 15,212.44, 20,992.71 and 8,497.90 is: 11,726.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.44 : 20,992.71 = 8,497.90 : x
  2. Step 2: Convert to fraction form
    15,212.44/20,992.71 = 8,497.90/x
  3. Step 3: Cross multiply
    15,212.44x = 20,992.71 × 8,497.90
  4. Step 4: Simplify right side
    15,212.44x = 178,393,950.31
  5. Step 5: Solve for x
    x = 178,393,950.31/15,212.44
  6. Step 6: Final answer
    x = 11,726.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.