Home / 21,097.12-31,650.48-11,231.20

Finding the Fourth Proportional to 21,097.12, 31,650.48 and 11,231.20

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Solution

The fourth proportional to 21,097.12, 31,650.48 and 11,231.20 is: 16,849.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,097.12 : 31,650.48 = 11,231.20 : x
  2. Step 2: Convert to fraction form
    21,097.12/31,650.48 = 11,231.20/x
  3. Step 3: Cross multiply
    21,097.12x = 31,650.48 × 11,231.20
  4. Step 4: Simplify right side
    21,097.12x = 355,472,870.98
  5. Step 5: Solve for x
    x = 355,472,870.98/21,097.12
  6. Step 6: Final answer
    x = 16,849.36

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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.