Home / 20,187.63-30,297.32-13,991.21

Finding the Fourth Proportional to 20,187.63, 30,297.32 and 13,991.21

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Solution

The fourth proportional to 20,187.63, 30,297.32 and 13,991.21 is: 20,997.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,187.63 : 30,297.32 = 13,991.21 : x
  2. Step 2: Convert to fraction form
    20,187.63/30,297.32 = 13,991.21/x
  3. Step 3: Cross multiply
    20,187.63x = 30,297.32 × 13,991.21
  4. Step 4: Simplify right side
    20,187.63x = 423,895,986.64
  5. Step 5: Solve for x
    x = 423,895,986.64/20,187.63
  6. Step 6: Final answer
    x = 20,997.81

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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.