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Finding the Fourth Proportional to 10,815, 16,222.52 and 2,607

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Solution

The fourth proportional to 10,815, 16,222.52 and 2,607 is: 3,910.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,815 : 16,222.52 = 2,607 : x
  2. Step 2: Convert to fraction form
    10,815/16,222.52 = 2,607/x
  3. Step 3: Cross multiply
    10,815x = 16,222.52 × 2,607
  4. Step 4: Simplify right side
    10,815x = 42,292,109.64
  5. Step 5: Solve for x
    x = 42,292,109.64/10,815
  6. Step 6: Final answer
    x = 3,910.50

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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.