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Finding the Fourth Proportional to 13,998.32, 20,991.16 and 4,134.16

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Solution

The fourth proportional to 13,998.32, 20,991.16 and 4,134.16 is: 6,199.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.32 : 20,991.16 = 4,134.16 : x
  2. Step 2: Convert to fraction form
    13,998.32/20,991.16 = 4,134.16/x
  3. Step 3: Cross multiply
    13,998.32x = 20,991.16 × 4,134.16
  4. Step 4: Simplify right side
    13,998.32x = 86,780,814.03
  5. Step 5: Solve for x
    x = 86,780,814.03/13,998.32
  6. Step 6: Final answer
    x = 6,199.37

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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.