Home / 28,939.75-39,918.98-19,860.97

Finding the Fourth Proportional to 28,939.75, 39,918.98 and 19,860.97

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Solution

The fourth proportional to 28,939.75, 39,918.98 and 19,860.97 is: 27,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.75 : 39,918.98 = 19,860.97 : x
  2. Step 2: Convert to fraction form
    28,939.75/39,918.98 = 19,860.97/x
  3. Step 3: Cross multiply
    28,939.75x = 39,918.98 × 19,860.97
  4. Step 4: Simplify right side
    28,939.75x = 792,829,664.21
  5. Step 5: Solve for x
    x = 792,829,664.21/28,939.75
  6. Step 6: Final answer
    x = 27,395.87

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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.