Home / 13,881.09-20,821.80-4,521.15

Finding the Fourth Proportional to 13,881.09, 20,821.80 and 4,521.15

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Solution

The fourth proportional to 13,881.09, 20,821.80 and 4,521.15 is: 6,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.09 : 20,821.80 = 4,521.15 : x
  2. Step 2: Convert to fraction form
    13,881.09/20,821.80 = 4,521.15/x
  3. Step 3: Cross multiply
    13,881.09x = 20,821.80 × 4,521.15
  4. Step 4: Simplify right side
    13,881.09x = 94,138,481.07
  5. Step 5: Solve for x
    x = 94,138,481.07/13,881.09
  6. Step 6: Final answer
    x = 6,781.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.