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Finding the Fourth Proportional to 20,069.20, 30,118.20 and 11,294.80

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Solution

The fourth proportional to 20,069.20, 30,118.20 and 11,294.80 is: 16,950.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,069.20 : 30,118.20 = 11,294.80 : x
  2. Step 2: Convert to fraction form
    20,069.20/30,118.20 = 11,294.80/x
  3. Step 3: Cross multiply
    20,069.20x = 30,118.20 × 11,294.80
  4. Step 4: Simplify right side
    20,069.20x = 340,179,045.36
  5. Step 5: Solve for x
    x = 340,179,045.36/20,069.20
  6. Step 6: Final answer
    x = 16,950.30

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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.