Home / 20,872.19-28,799.37-12,370.57

Finding the Fourth Proportional to 20,872.19, 28,799.37 and 12,370.57

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Solution

The fourth proportional to 20,872.19, 28,799.37 and 12,370.57 is: 17,068.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.19 : 28,799.37 = 12,370.57 : x
  2. Step 2: Convert to fraction form
    20,872.19/28,799.37 = 12,370.57/x
  3. Step 3: Cross multiply
    20,872.19x = 28,799.37 × 12,370.57
  4. Step 4: Simplify right side
    20,872.19x = 356,264,550.54
  5. Step 5: Solve for x
    x = 356,264,550.54/20,872.19
  6. Step 6: Final answer
    x = 17,068.86

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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.