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Finding the Fourth Proportional to 18,824.40, 28,217.40 and 11,029.20

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Solution

The fourth proportional to 18,824.40, 28,217.40 and 11,029.20 is: 16,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.40 : 28,217.40 = 11,029.20 : x
  2. Step 2: Convert to fraction form
    18,824.40/28,217.40 = 11,029.20/x
  3. Step 3: Cross multiply
    18,824.40x = 28,217.40 × 11,029.20
  4. Step 4: Simplify right side
    18,824.40x = 311,215,348.08
  5. Step 5: Solve for x
    x = 311,215,348.08/18,824.40
  6. Step 6: Final answer
    x = 16,532.55

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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.