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Finding the Fourth Proportional to 13,388.68, 20,065.10 and 5,991.56

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Solution

The fourth proportional to 13,388.68, 20,065.10 and 5,991.56 is: 8,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.68 : 20,065.10 = 5,991.56 : x
  2. Step 2: Convert to fraction form
    13,388.68/20,065.10 = 5,991.56/x
  3. Step 3: Cross multiply
    13,388.68x = 20,065.10 × 5,991.56
  4. Step 4: Simplify right side
    13,388.68x = 120,221,250.56
  5. Step 5: Solve for x
    x = 120,221,250.56/13,388.68
  6. Step 6: Final answer
    x = 8,979.32

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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.