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Finding the Fourth Proportional to 18,724.90, 28,079 and 7,029.86

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Solution

The fourth proportional to 18,724.90, 28,079 and 7,029.86 is: 10,541.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.90 : 28,079 = 7,029.86 : x
  2. Step 2: Convert to fraction form
    18,724.90/28,079 = 7,029.86/x
  3. Step 3: Cross multiply
    18,724.90x = 28,079 × 7,029.86
  4. Step 4: Simplify right side
    18,724.90x = 197,391,438.94
  5. Step 5: Solve for x
    x = 197,391,438.94/18,724.90
  6. Step 6: Final answer
    x = 10,541.66

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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.