Home / 20,780.16-31,173.44-6,928

Finding the Fourth Proportional to 20,780.16, 31,173.44 and 6,928

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Solution

The fourth proportional to 20,780.16, 31,173.44 and 6,928 is: 10,393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.16 : 31,173.44 = 6,928 : x
  2. Step 2: Convert to fraction form
    20,780.16/31,173.44 = 6,928/x
  3. Step 3: Cross multiply
    20,780.16x = 31,173.44 × 6,928
  4. Step 4: Simplify right side
    20,780.16x = 215,969,592.32
  5. Step 5: Solve for x
    x = 215,969,592.32/20,780.16
  6. Step 6: Final answer
    x = 10,393.07

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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.