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Finding the Fourth Proportional to 18,763.62, 28,148.83 and 8,902.80

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Solution

The fourth proportional to 18,763.62, 28,148.83 and 8,902.80 is: 13,355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.62 : 28,148.83 = 8,902.80 : x
  2. Step 2: Convert to fraction form
    18,763.62/28,148.83 = 8,902.80/x
  3. Step 3: Cross multiply
    18,763.62x = 28,148.83 × 8,902.80
  4. Step 4: Simplify right side
    18,763.62x = 250,603,403.72
  5. Step 5: Solve for x
    x = 250,603,403.72/18,763.62
  6. Step 6: Final answer
    x = 13,355.82

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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.