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Finding the Fourth Proportional to 11,959.72, 17,939.59 and 5,718.26

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Solution

The fourth proportional to 11,959.72, 17,939.59 and 5,718.26 is: 8,577.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,959.72 : 17,939.59 = 5,718.26 : x
  2. Step 2: Convert to fraction form
    11,959.72/17,939.59 = 5,718.26/x
  3. Step 3: Cross multiply
    11,959.72x = 17,939.59 × 5,718.26
  4. Step 4: Simplify right side
    11,959.72x = 102,583,270.47
  5. Step 5: Solve for x
    x = 102,583,270.47/11,959.72
  6. Step 6: Final answer
    x = 8,577.40

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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.