Home / 21,147.80-31,721.73-6,356.72

Finding the Fourth Proportional to 21,147.80, 31,721.73 and 6,356.72

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Solution

The fourth proportional to 21,147.80, 31,721.73 and 6,356.72 is: 9,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.80 : 31,721.73 = 6,356.72 : x
  2. Step 2: Convert to fraction form
    21,147.80/31,721.73 = 6,356.72/x
  3. Step 3: Cross multiply
    21,147.80x = 31,721.73 × 6,356.72
  4. Step 4: Simplify right side
    21,147.80x = 201,646,141.62
  5. Step 5: Solve for x
    x = 201,646,141.62/21,147.80
  6. Step 6: Final answer
    x = 9,535.09

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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.