Home / 20,888.91-31,324.14-9,786.65

Finding the Fourth Proportional to 20,888.91, 31,324.14 and 9,786.65

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Solution

The fourth proportional to 20,888.91, 31,324.14 and 9,786.65 is: 14,675.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.91 : 31,324.14 = 9,786.65 : x
  2. Step 2: Convert to fraction form
    20,888.91/31,324.14 = 9,786.65/x
  3. Step 3: Cross multiply
    20,888.91x = 31,324.14 × 9,786.65
  4. Step 4: Simplify right side
    20,888.91x = 306,558,238.11
  5. Step 5: Solve for x
    x = 306,558,238.11/20,888.91
  6. Step 6: Final answer
    x = 14,675.65

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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.