Home / 28,505.71-39,350.37-21,791.62

Finding the Fourth Proportional to 28,505.71, 39,350.37 and 21,791.62

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Solution

The fourth proportional to 28,505.71, 39,350.37 and 21,791.62 is: 30,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.71 : 39,350.37 = 21,791.62 : x
  2. Step 2: Convert to fraction form
    28,505.71/39,350.37 = 21,791.62/x
  3. Step 3: Cross multiply
    28,505.71x = 39,350.37 × 21,791.62
  4. Step 4: Simplify right side
    28,505.71x = 857,508,309.90
  5. Step 5: Solve for x
    x = 857,508,309.90/28,505.71
  6. Step 6: Final answer
    x = 30,081.98

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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.