Home / 21,212.65-31,808.08-11,222.79

Finding the Fourth Proportional to 21,212.65, 31,808.08 and 11,222.79

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Solution

The fourth proportional to 21,212.65, 31,808.08 and 11,222.79 is: 16,828.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.65 : 31,808.08 = 11,222.79 : x
  2. Step 2: Convert to fraction form
    21,212.65/31,808.08 = 11,222.79/x
  3. Step 3: Cross multiply
    21,212.65x = 31,808.08 × 11,222.79
  4. Step 4: Simplify right side
    21,212.65x = 356,975,402.14
  5. Step 5: Solve for x
    x = 356,975,402.14/21,212.65
  6. Step 6: Final answer
    x = 16,828.42

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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.