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Finding the Fourth Proportional to 18,902.17, 28,353.33 and 7,657.73

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Solution

The fourth proportional to 18,902.17, 28,353.33 and 7,657.73 is: 11,486.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.17 : 28,353.33 = 7,657.73 : x
  2. Step 2: Convert to fraction form
    18,902.17/28,353.33 = 7,657.73/x
  3. Step 3: Cross multiply
    18,902.17x = 28,353.33 × 7,657.73
  4. Step 4: Simplify right side
    18,902.17x = 217,122,082.21
  5. Step 5: Solve for x
    x = 217,122,082.21/18,902.17
  6. Step 6: Final answer
    x = 11,486.62

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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.