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Finding the Fourth Proportional to 17,908.68, 26,856 and 10,515

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Solution

The fourth proportional to 17,908.68, 26,856 and 10,515 is: 15,768.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,908.68 : 26,856 = 10,515 : x
  2. Step 2: Convert to fraction form
    17,908.68/26,856 = 10,515/x
  3. Step 3: Cross multiply
    17,908.68x = 26,856 × 10,515
  4. Step 4: Simplify right side
    17,908.68x = 282,390,840
  5. Step 5: Solve for x
    x = 282,390,840/17,908.68
  6. Step 6: Final answer
    x = 15,768.38

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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.