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Finding the Fourth Proportional to 18,830.10, 28,245.15 and 10,932.60

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Solution

The fourth proportional to 18,830.10, 28,245.15 and 10,932.60 is: 16,398.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,830.10 : 28,245.15 = 10,932.60 : x
  2. Step 2: Convert to fraction form
    18,830.10/28,245.15 = 10,932.60/x
  3. Step 3: Cross multiply
    18,830.10x = 28,245.15 × 10,932.60
  4. Step 4: Simplify right side
    18,830.10x = 308,792,926.89
  5. Step 5: Solve for x
    x = 308,792,926.89/18,830.10
  6. Step 6: Final answer
    x = 16,398.90

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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.