Home / 28,364.88-39,131.19-19,868.43

Finding the Fourth Proportional to 28,364.88, 39,131.19 and 19,868.43

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Solution

The fourth proportional to 28,364.88, 39,131.19 and 19,868.43 is: 27,409.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.88 : 39,131.19 = 19,868.43 : x
  2. Step 2: Convert to fraction form
    28,364.88/39,131.19 = 19,868.43/x
  3. Step 3: Cross multiply
    28,364.88x = 39,131.19 × 19,868.43
  4. Step 4: Simplify right side
    28,364.88x = 777,475,309.33
  5. Step 5: Solve for x
    x = 777,475,309.33/28,364.88
  6. Step 6: Final answer
    x = 27,409.79

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1.5x scale

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.