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Finding the Fourth Proportional to 12,693.43, 19,061.93 and 7,791.85

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Solution

The fourth proportional to 12,693.43, 19,061.93 and 7,791.85 is: 11,701.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693.43 : 19,061.93 = 7,791.85 : x
  2. Step 2: Convert to fraction form
    12,693.43/19,061.93 = 7,791.85/x
  3. Step 3: Cross multiply
    12,693.43x = 19,061.93 × 7,791.85
  4. Step 4: Simplify right side
    12,693.43x = 148,527,660.31
  5. Step 5: Solve for x
    x = 148,527,660.31/12,693.43
  6. Step 6: Final answer
    x = 11,701.14

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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.