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Finding the Fourth Proportional to 20,499.56, 30,798.54 and 13,118.44

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Solution

The fourth proportional to 20,499.56, 30,798.54 and 13,118.44 is: 19,709.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.56 : 30,798.54 = 13,118.44 : x
  2. Step 2: Convert to fraction form
    20,499.56/30,798.54 = 13,118.44/x
  3. Step 3: Cross multiply
    20,499.56x = 30,798.54 × 13,118.44
  4. Step 4: Simplify right side
    20,499.56x = 404,028,799.08
  5. Step 5: Solve for x
    x = 404,028,799.08/20,499.56
  6. Step 6: Final answer
    x = 19,709.14

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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.