Home / 20,812.23-31,203.75-7,662.87

Finding the Fourth Proportional to 20,812.23, 31,203.75 and 7,662.87

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Solution

The fourth proportional to 20,812.23, 31,203.75 and 7,662.87 is: 11,488.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.23 : 31,203.75 = 7,662.87 : x
  2. Step 2: Convert to fraction form
    20,812.23/31,203.75 = 7,662.87/x
  3. Step 3: Cross multiply
    20,812.23x = 31,203.75 × 7,662.87
  4. Step 4: Simplify right side
    20,812.23x = 239,110,279.76
  5. Step 5: Solve for x
    x = 239,110,279.76/20,812.23
  6. Step 6: Final answer
    x = 11,488.93

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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.