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Finding the Fourth Proportional to 17,561.61, 26,347.28 and 7,180.65

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Solution

The fourth proportional to 17,561.61, 26,347.28 and 7,180.65 is: 10,772.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,561.61 : 26,347.28 = 7,180.65 : x
  2. Step 2: Convert to fraction form
    17,561.61/26,347.28 = 7,180.65/x
  3. Step 3: Cross multiply
    17,561.61x = 26,347.28 × 7,180.65
  4. Step 4: Simplify right side
    17,561.61x = 189,190,560.23
  5. Step 5: Solve for x
    x = 189,190,560.23/17,561.61
  6. Step 6: Final answer
    x = 10,772.96

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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.