Home / 21,042.57-31,569.78-7,003.85

Finding the Fourth Proportional to 21,042.57, 31,569.78 and 7,003.85

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Solution

The fourth proportional to 21,042.57, 31,569.78 and 7,003.85 is: 10,507.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.57 : 31,569.78 = 7,003.85 : x
  2. Step 2: Convert to fraction form
    21,042.57/31,569.78 = 7,003.85/x
  3. Step 3: Cross multiply
    21,042.57x = 31,569.78 × 7,003.85
  4. Step 4: Simplify right side
    21,042.57x = 221,110,003.65
  5. Step 5: Solve for x
    x = 221,110,003.65/21,042.57
  6. Step 6: Final answer
    x = 10,507.75

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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.