Home / 20,835.38-31,239.14-11,479.88

Finding the Fourth Proportional to 20,835.38, 31,239.14 and 11,479.88

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Solution

The fourth proportional to 20,835.38, 31,239.14 and 11,479.88 is: 17,212.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.38 : 31,239.14 = 11,479.88 : x
  2. Step 2: Convert to fraction form
    20,835.38/31,239.14 = 11,479.88/x
  3. Step 3: Cross multiply
    20,835.38x = 31,239.14 × 11,479.88
  4. Step 4: Simplify right side
    20,835.38x = 358,621,578.50
  5. Step 5: Solve for x
    x = 358,621,578.50/20,835.38
  6. Step 6: Final answer
    x = 17,212.14

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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.