Home / 21,811.59-30,099.20-13,327.91

Finding the Fourth Proportional to 21,811.59, 30,099.20 and 13,327.91

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Solution

The fourth proportional to 21,811.59, 30,099.20 and 13,327.91 is: 18,392.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,811.59 : 30,099.20 = 13,327.91 : x
  2. Step 2: Convert to fraction form
    21,811.59/30,099.20 = 13,327.91/x
  3. Step 3: Cross multiply
    21,811.59x = 30,099.20 × 13,327.91
  4. Step 4: Simplify right side
    21,811.59x = 401,159,380.64
  5. Step 5: Solve for x
    x = 401,159,380.64/21,811.59
  6. Step 6: Final answer
    x = 18,392.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.