Home / 28,470.29-39,286.94-15,721.43

Finding the Fourth Proportional to 28,470.29, 39,286.94 and 15,721.43

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Solution

The fourth proportional to 28,470.29, 39,286.94 and 15,721.43 is: 21,694.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.29 : 39,286.94 = 15,721.43 : x
  2. Step 2: Convert to fraction form
    28,470.29/39,286.94 = 15,721.43/x
  3. Step 3: Cross multiply
    28,470.29x = 39,286.94 × 15,721.43
  4. Step 4: Simplify right side
    28,470.29x = 617,646,602.08
  5. Step 5: Solve for x
    x = 617,646,602.08/28,470.29
  6. Step 6: Final answer
    x = 21,694.43

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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.