Home / 20,906.51-31,365.23-6,115.91

Finding the Fourth Proportional to 20,906.51, 31,365.23 and 6,115.91

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Solution

The fourth proportional to 20,906.51, 31,365.23 and 6,115.91 is: 9,175.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.51 : 31,365.23 = 6,115.91 : x
  2. Step 2: Convert to fraction form
    20,906.51/31,365.23 = 6,115.91/x
  3. Step 3: Cross multiply
    20,906.51x = 31,365.23 × 6,115.91
  4. Step 4: Simplify right side
    20,906.51x = 191,826,736.40
  5. Step 5: Solve for x
    x = 191,826,736.40/20,906.51
  6. Step 6: Final answer
    x = 9,175.46

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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.