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Finding the Fourth Proportional to 18,769.62, 28,123.30 and 13,211.30

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Solution

The fourth proportional to 18,769.62, 28,123.30 and 13,211.30 is: 19,795.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,769.62 : 28,123.30 = 13,211.30 : x
  2. Step 2: Convert to fraction form
    18,769.62/28,123.30 = 13,211.30/x
  3. Step 3: Cross multiply
    18,769.62x = 28,123.30 × 13,211.30
  4. Step 4: Simplify right side
    18,769.62x = 371,545,353.29
  5. Step 5: Solve for x
    x = 371,545,353.29/18,769.62
  6. Step 6: Final answer
    x = 19,795.04

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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.