Home / 20,902.35-28,843.32-12,403.00

Finding the Fourth Proportional to 20,902.35, 28,843.32 and 12,403.00

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Solution

The fourth proportional to 20,902.35, 28,843.32 and 12,403.00 is: 17,115.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.35 : 28,843.32 = 12,403.00 : x
  2. Step 2: Convert to fraction form
    20,902.35/28,843.32 = 12,403.00/x
  3. Step 3: Cross multiply
    20,902.35x = 28,843.32 × 12,403.00
  4. Step 4: Simplify right side
    20,902.35x = 357,743,780.53
  5. Step 5: Solve for x
    x = 357,743,780.53/20,902.35
  6. Step 6: Final answer
    x = 17,115.00

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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.