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Finding the Fourth Proportional to 18,763.73, 28,123.72 and 10,956.14

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Solution

The fourth proportional to 18,763.73, 28,123.72 and 10,956.14 is: 16,421.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.73 : 28,123.72 = 10,956.14 : x
  2. Step 2: Convert to fraction form
    18,763.73/28,123.72 = 10,956.14/x
  3. Step 3: Cross multiply
    18,763.73x = 28,123.72 × 10,956.14
  4. Step 4: Simplify right side
    18,763.73x = 308,127,245.63
  5. Step 5: Solve for x
    x = 308,127,245.63/18,763.73
  6. Step 6: Final answer
    x = 16,421.43

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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.