Home / 20,853.16-28,789.86-12,906.04

Finding the Fourth Proportional to 20,853.16, 28,789.86 and 12,906.04

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Solution

The fourth proportional to 20,853.16, 28,789.86 and 12,906.04 is: 17,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.16 : 28,789.86 = 12,906.04 : x
  2. Step 2: Convert to fraction form
    20,853.16/28,789.86 = 12,906.04/x
  3. Step 3: Cross multiply
    20,853.16x = 28,789.86 × 12,906.04
  4. Step 4: Simplify right side
    20,853.16x = 371,563,084.75
  5. Step 5: Solve for x
    x = 371,563,084.75/20,853.16
  6. Step 6: Final answer
    x = 17,818.07

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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.