Home / 21,277.80-31,905.96-12,396.06

Finding the Fourth Proportional to 21,277.80, 31,905.96 and 12,396.06

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Solution

The fourth proportional to 21,277.80, 31,905.96 and 12,396.06 is: 18,587.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.80 : 31,905.96 = 12,396.06 : x
  2. Step 2: Convert to fraction form
    21,277.80/31,905.96 = 12,396.06/x
  3. Step 3: Cross multiply
    21,277.80x = 31,905.96 × 12,396.06
  4. Step 4: Simplify right side
    21,277.80x = 395,508,194.52
  5. Step 5: Solve for x
    x = 395,508,194.52/21,277.80
  6. Step 6: Final answer
    x = 18,587.83

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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.