Home / 20,775.18-31,162.80-5,192.82

Finding the Fourth Proportional to 20,775.18, 31,162.80 and 5,192.82

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Solution

The fourth proportional to 20,775.18, 31,162.80 and 5,192.82 is: 7,789.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.18 : 31,162.80 = 5,192.82 : x
  2. Step 2: Convert to fraction form
    20,775.18/31,162.80 = 5,192.82/x
  3. Step 3: Cross multiply
    20,775.18x = 31,162.80 × 5,192.82
  4. Step 4: Simplify right side
    20,775.18x = 161,822,811.10
  5. Step 5: Solve for x
    x = 161,822,811.10/20,775.18
  6. Step 6: Final answer
    x = 7,789.24

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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.