Home / 21,212.72-31,797.24-10,102.88

Finding the Fourth Proportional to 21,212.72, 31,797.24 and 10,102.88

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Solution

The fourth proportional to 21,212.72, 31,797.24 and 10,102.88 is: 15,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.72 : 31,797.24 = 10,102.88 : x
  2. Step 2: Convert to fraction form
    21,212.72/31,797.24 = 10,102.88/x
  3. Step 3: Cross multiply
    21,212.72x = 31,797.24 × 10,102.88
  4. Step 4: Simplify right side
    21,212.72x = 321,243,700.05
  5. Step 5: Solve for x
    x = 321,243,700.05/21,212.72
  6. Step 6: Final answer
    x = 15,143.92

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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.