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Finding the Fourth Proportional to 18,893.23, 28,315.20 and 7,788.73

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Solution

The fourth proportional to 18,893.23, 28,315.20 and 7,788.73 is: 11,672.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893.23 : 28,315.20 = 7,788.73 : x
  2. Step 2: Convert to fraction form
    18,893.23/28,315.20 = 7,788.73/x
  3. Step 3: Cross multiply
    18,893.23x = 28,315.20 × 7,788.73
  4. Step 4: Simplify right side
    18,893.23x = 220,539,447.70
  5. Step 5: Solve for x
    x = 220,539,447.70/18,893.23
  6. Step 6: Final answer
    x = 11,672.94

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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.