Home / 20,788.68-31,149.48-12,464.88

Finding the Fourth Proportional to 20,788.68, 31,149.48 and 12,464.88

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Solution

The fourth proportional to 20,788.68, 31,149.48 and 12,464.88 is: 18,677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.68 : 31,149.48 = 12,464.88 : x
  2. Step 2: Convert to fraction form
    20,788.68/31,149.48 = 12,464.88/x
  3. Step 3: Cross multiply
    20,788.68x = 31,149.48 × 12,464.88
  4. Step 4: Simplify right side
    20,788.68x = 388,274,530.26
  5. Step 5: Solve for x
    x = 388,274,530.26/20,788.68
  6. Step 6: Final answer
    x = 18,677.21

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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.