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Finding the Fourth Proportional to 20,408.88, 30,588.72 and 17,726.88

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Solution

The fourth proportional to 20,408.88, 30,588.72 and 17,726.88 is: 26,568.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,408.88 : 30,588.72 = 17,726.88 : x
  2. Step 2: Convert to fraction form
    20,408.88/30,588.72 = 17,726.88/x
  3. Step 3: Cross multiply
    20,408.88x = 30,588.72 × 17,726.88
  4. Step 4: Simplify right side
    20,408.88x = 542,242,568.79
  5. Step 5: Solve for x
    x = 542,242,568.79/20,408.88
  6. Step 6: Final answer
    x = 26,568.95

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1.5x scale

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.