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Finding the Fourth Proportional to 11,479.38, 15,857.16 and 8,992.95

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Solution

The fourth proportional to 11,479.38, 15,857.16 and 8,992.95 is: 12,422.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,479.38 : 15,857.16 = 8,992.95 : x
  2. Step 2: Convert to fraction form
    11,479.38/15,857.16 = 8,992.95/x
  3. Step 3: Cross multiply
    11,479.38x = 15,857.16 × 8,992.95
  4. Step 4: Simplify right side
    11,479.38x = 142,602,647.02
  5. Step 5: Solve for x
    x = 142,602,647.02/11,479.38
  6. Step 6: Final answer
    x = 12,422.50

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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.