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Finding the Fourth Proportional to 18,959.90, 28,442.96 and 8,433.55

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Solution

The fourth proportional to 18,959.90, 28,442.96 and 8,433.55 is: 12,651.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.90 : 28,442.96 = 8,433.55 : x
  2. Step 2: Convert to fraction form
    18,959.90/28,442.96 = 8,433.55/x
  3. Step 3: Cross multiply
    18,959.90x = 28,442.96 × 8,433.55
  4. Step 4: Simplify right side
    18,959.90x = 239,874,940.93
  5. Step 5: Solve for x
    x = 239,874,940.93/18,959.90
  6. Step 6: Final answer
    x = 12,651.70

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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.