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Finding the Fourth Proportional to 10,668.92, 15,971.79 and 7,907.99

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Solution

The fourth proportional to 10,668.92, 15,971.79 and 7,907.99 is: 11,838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,668.92 : 15,971.79 = 7,907.99 : x
  2. Step 2: Convert to fraction form
    10,668.92/15,971.79 = 7,907.99/x
  3. Step 3: Cross multiply
    10,668.92x = 15,971.79 × 7,907.99
  4. Step 4: Simplify right side
    10,668.92x = 126,304,675.74
  5. Step 5: Solve for x
    x = 126,304,675.74/10,668.92
  6. Step 6: Final answer
    x = 11,838.57

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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.