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Finding the Fourth Proportional to 17,726.70, 26,532.45 and 13,809.90

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Solution

The fourth proportional to 17,726.70, 26,532.45 and 13,809.90 is: 20,669.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,726.70 : 26,532.45 = 13,809.90 : x
  2. Step 2: Convert to fraction form
    17,726.70/26,532.45 = 13,809.90/x
  3. Step 3: Cross multiply
    17,726.70x = 26,532.45 × 13,809.90
  4. Step 4: Simplify right side
    17,726.70x = 366,410,481.26
  5. Step 5: Solve for x
    x = 366,410,481.26/17,726.70
  6. Step 6: Final answer
    x = 20,669.98

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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.