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Finding the Fourth Proportional to 20,361.34, 28,098.50 and 11,408.92

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Solution

The fourth proportional to 20,361.34, 28,098.50 and 11,408.92 is: 15,744.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,361.34 : 28,098.50 = 11,408.92 : x
  2. Step 2: Convert to fraction form
    20,361.34/28,098.50 = 11,408.92/x
  3. Step 3: Cross multiply
    20,361.34x = 28,098.50 × 11,408.92
  4. Step 4: Simplify right side
    20,361.34x = 320,573,538.62
  5. Step 5: Solve for x
    x = 320,573,538.62/20,361.34
  6. Step 6: Final answer
    x = 15,744.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.