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Finding the Fourth Proportional to 15,292, 21,103 and 8,922.97

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Solution

The fourth proportional to 15,292, 21,103 and 8,922.97 is: 12,313.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,292 : 21,103 = 8,922.97 : x
  2. Step 2: Convert to fraction form
    15,292/21,103 = 8,922.97/x
  3. Step 3: Cross multiply
    15,292x = 21,103 × 8,922.97
  4. Step 4: Simplify right side
    15,292x = 188,301,435.91
  5. Step 5: Solve for x
    x = 188,301,435.91/15,292
  6. Step 6: Final answer
    x = 12,313.72

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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.