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Finding the Fourth Proportional to 19,231, 26,538.78 and 10,399

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Solution

The fourth proportional to 19,231, 26,538.78 and 10,399 is: 14,350.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231 : 26,538.78 = 10,399 : x
  2. Step 2: Convert to fraction form
    19,231/26,538.78 = 10,399/x
  3. Step 3: Cross multiply
    19,231x = 26,538.78 × 10,399
  4. Step 4: Simplify right side
    19,231x = 275,976,773.22
  5. Step 5: Solve for x
    x = 275,976,773.22/19,231
  6. Step 6: Final answer
    x = 14,350.62

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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.