Home / 21,277.80-31,918.92-8,141.16

Finding the Fourth Proportional to 21,277.80, 31,918.92 and 8,141.16

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Solution

The fourth proportional to 21,277.80, 31,918.92 and 8,141.16 is: 12,212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.80 : 31,918.92 = 8,141.16 : x
  2. Step 2: Convert to fraction form
    21,277.80/31,918.92 = 8,141.16/x
  3. Step 3: Cross multiply
    21,277.80x = 31,918.92 × 8,141.16
  4. Step 4: Simplify right side
    21,277.80x = 259,857,034.75
  5. Step 5: Solve for x
    x = 259,857,034.75/21,277.80
  6. Step 6: Final answer
    x = 12,212.59

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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.