Home / 21,174.80-31,719.84-12,736.64

Finding the Fourth Proportional to 21,174.80, 31,719.84 and 12,736.64

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Solution

The fourth proportional to 21,174.80, 31,719.84 and 12,736.64 is: 19,079.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.80 : 31,719.84 = 12,736.64 : x
  2. Step 2: Convert to fraction form
    21,174.80/31,719.84 = 12,736.64/x
  3. Step 3: Cross multiply
    21,174.80x = 31,719.84 × 12,736.64
  4. Step 4: Simplify right side
    21,174.80x = 404,004,143.29
  5. Step 5: Solve for x
    x = 404,004,143.29/21,174.80
  6. Step 6: Final answer
    x = 19,079.48

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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.