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Finding the Fourth Proportional to 20,443.44, 30,665.16 and 8,749.08

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Solution

The fourth proportional to 20,443.44, 30,665.16 and 8,749.08 is: 13,123.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.44 : 30,665.16 = 8,749.08 : x
  2. Step 2: Convert to fraction form
    20,443.44/30,665.16 = 8,749.08/x
  3. Step 3: Cross multiply
    20,443.44x = 30,665.16 × 8,749.08
  4. Step 4: Simplify right side
    20,443.44x = 268,291,938.05
  5. Step 5: Solve for x
    x = 268,291,938.05/20,443.44
  6. Step 6: Final answer
    x = 13,123.62

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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.