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Finding the Fourth Proportional to 18,885.20, 28,329.65 and 6,880.62

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Solution

The fourth proportional to 18,885.20, 28,329.65 and 6,880.62 is: 10,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.20 : 28,329.65 = 6,880.62 : x
  2. Step 2: Convert to fraction form
    18,885.20/28,329.65 = 6,880.62/x
  3. Step 3: Cross multiply
    18,885.20x = 28,329.65 × 6,880.62
  4. Step 4: Simplify right side
    18,885.20x = 194,925,414.73
  5. Step 5: Solve for x
    x = 194,925,414.73/18,885.20
  6. Step 6: Final answer
    x = 10,321.60

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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.