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Finding the Fourth Proportional to 22,408.92, 30,912.30 and 13,905.72

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Solution

The fourth proportional to 22,408.92, 30,912.30 and 13,905.72 is: 19,182.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,408.92 : 30,912.30 = 13,905.72 : x
  2. Step 2: Convert to fraction form
    22,408.92/30,912.30 = 13,905.72/x
  3. Step 3: Cross multiply
    22,408.92x = 30,912.30 × 13,905.72
  4. Step 4: Simplify right side
    22,408.92x = 429,857,788.36
  5. Step 5: Solve for x
    x = 429,857,788.36/22,408.92
  6. Step 6: Final answer
    x = 19,182.44

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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.