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Finding the Fourth Proportional to 15,874, 21,906.12 and 8,801.50

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Solution

The fourth proportional to 15,874, 21,906.12 and 8,801.50 is: 12,146.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874 : 21,906.12 = 8,801.50 : x
  2. Step 2: Convert to fraction form
    15,874/21,906.12 = 8,801.50/x
  3. Step 3: Cross multiply
    15,874x = 21,906.12 × 8,801.50
  4. Step 4: Simplify right side
    15,874x = 192,806,715.18
  5. Step 5: Solve for x
    x = 192,806,715.18/15,874
  6. Step 6: Final answer
    x = 12,146.07

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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.