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Finding the Fourth Proportional to 19,215.36, 28,874.88 and 10,908

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Solution

The fourth proportional to 19,215.36, 28,874.88 and 10,908 is: 16,391.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.36 : 28,874.88 = 10,908 : x
  2. Step 2: Convert to fraction form
    19,215.36/28,874.88 = 10,908/x
  3. Step 3: Cross multiply
    19,215.36x = 28,874.88 × 10,908
  4. Step 4: Simplify right side
    19,215.36x = 314,967,191.04
  5. Step 5: Solve for x
    x = 314,967,191.04/19,215.36
  6. Step 6: Final answer
    x = 16,391.43

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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.