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Finding the Fourth Proportional to 18,833.70, 28,218.15 and 8,951.70

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Solution

The fourth proportional to 18,833.70, 28,218.15 and 8,951.70 is: 13,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.70 : 28,218.15 = 8,951.70 : x
  2. Step 2: Convert to fraction form
    18,833.70/28,218.15 = 8,951.70/x
  3. Step 3: Cross multiply
    18,833.70x = 28,218.15 × 8,951.70
  4. Step 4: Simplify right side
    18,833.70x = 252,600,413.36
  5. Step 5: Solve for x
    x = 252,600,413.36/18,833.70
  6. Step 6: Final answer
    x = 13,412.15

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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.