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Finding the Fourth Proportional to 22,990.80, 34,492.20 and 7,408.80

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Solution

The fourth proportional to 22,990.80, 34,492.20 and 7,408.80 is: 11,115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,990.80 : 34,492.20 = 7,408.80 : x
  2. Step 2: Convert to fraction form
    22,990.80/34,492.20 = 7,408.80/x
  3. Step 3: Cross multiply
    22,990.80x = 34,492.20 × 7,408.80
  4. Step 4: Simplify right side
    22,990.80x = 255,545,811.36
  5. Step 5: Solve for x
    x = 255,545,811.36/22,990.80
  6. Step 6: Final answer
    x = 11,115.13

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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.