Home / 21,538.22-32,322.09-8,390.66

Finding the Fourth Proportional to 21,538.22, 32,322.09 and 8,390.66

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Solution

The fourth proportional to 21,538.22, 32,322.09 and 8,390.66 is: 12,591.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538.22 : 32,322.09 = 8,390.66 : x
  2. Step 2: Convert to fraction form
    21,538.22/32,322.09 = 8,390.66/x
  3. Step 3: Cross multiply
    21,538.22x = 32,322.09 × 8,390.66
  4. Step 4: Simplify right side
    21,538.22x = 271,203,667.68
  5. Step 5: Solve for x
    x = 271,203,667.68/21,538.22
  6. Step 6: Final answer
    x = 12,591.74

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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.