Home / 21,083.43-31,629.71-7,935.77

Finding the Fourth Proportional to 21,083.43, 31,629.71 and 7,935.77

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Solution

The fourth proportional to 21,083.43, 31,629.71 and 7,935.77 is: 11,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.43 : 31,629.71 = 7,935.77 : x
  2. Step 2: Convert to fraction form
    21,083.43/31,629.71 = 7,935.77/x
  3. Step 3: Cross multiply
    21,083.43x = 31,629.71 × 7,935.77
  4. Step 4: Simplify right side
    21,083.43x = 251,005,980.08
  5. Step 5: Solve for x
    x = 251,005,980.08/21,083.43
  6. Step 6: Final answer
    x = 11,905.37

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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.