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Finding the Fourth Proportional to 11,707.68, 17,561.40 and 2,942.40

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Solution

The fourth proportional to 11,707.68, 17,561.40 and 2,942.40 is: 4,413.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,707.68 : 17,561.40 = 2,942.40 : x
  2. Step 2: Convert to fraction form
    11,707.68/17,561.40 = 2,942.40/x
  3. Step 3: Cross multiply
    11,707.68x = 17,561.40 × 2,942.40
  4. Step 4: Simplify right side
    11,707.68x = 51,672,663.36
  5. Step 5: Solve for x
    x = 51,672,663.36/11,707.68
  6. Step 6: Final answer
    x = 4,413.57

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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.