Home / 20,858.27-28,761.35-13,292.61

Finding the Fourth Proportional to 20,858.27, 28,761.35 and 13,292.61

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Solution

The fourth proportional to 20,858.27, 28,761.35 and 13,292.61 is: 18,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.27 : 28,761.35 = 13,292.61 : x
  2. Step 2: Convert to fraction form
    20,858.27/28,761.35 = 13,292.61/x
  3. Step 3: Cross multiply
    20,858.27x = 28,761.35 × 13,292.61
  4. Step 4: Simplify right side
    20,858.27x = 382,313,342.16
  5. Step 5: Solve for x
    x = 382,313,342.16/20,858.27
  6. Step 6: Final answer
    x = 18,329.11

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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.