Home / 20,780.44-28,677.11-11,349

Finding the Fourth Proportional to 20,780.44, 28,677.11 and 11,349

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Solution

The fourth proportional to 20,780.44, 28,677.11 and 11,349 is: 15,661.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.44 : 28,677.11 = 11,349 : x
  2. Step 2: Convert to fraction form
    20,780.44/28,677.11 = 11,349/x
  3. Step 3: Cross multiply
    20,780.44x = 28,677.11 × 11,349
  4. Step 4: Simplify right side
    20,780.44x = 325,456,521.39
  5. Step 5: Solve for x
    x = 325,456,521.39/20,780.44
  6. Step 6: Final answer
    x = 15,661.68

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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.