Home / 20,807.76-31,223.96-7,669.36

Finding the Fourth Proportional to 20,807.76, 31,223.96 and 7,669.36

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Solution

The fourth proportional to 20,807.76, 31,223.96 and 7,669.36 is: 11,508.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.76 : 31,223.96 = 7,669.36 : x
  2. Step 2: Convert to fraction form
    20,807.76/31,223.96 = 7,669.36/x
  3. Step 3: Cross multiply
    20,807.76x = 31,223.96 × 7,669.36
  4. Step 4: Simplify right side
    20,807.76x = 239,467,789.87
  5. Step 5: Solve for x
    x = 239,467,789.87/20,807.76
  6. Step 6: Final answer
    x = 11,508.58

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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.