Home / 21,161.15-31,743.83-7,837.71

Finding the Fourth Proportional to 21,161.15, 31,743.83 and 7,837.71

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Solution

The fourth proportional to 21,161.15, 31,743.83 and 7,837.71 is: 11,757.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.15 : 31,743.83 = 7,837.71 : x
  2. Step 2: Convert to fraction form
    21,161.15/31,743.83 = 7,837.71/x
  3. Step 3: Cross multiply
    21,161.15x = 31,743.83 × 7,837.71
  4. Step 4: Simplify right side
    21,161.15x = 248,798,933.83
  5. Step 5: Solve for x
    x = 248,798,933.83/21,161.15
  6. Step 6: Final answer
    x = 11,757.34

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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.