Home / 20,239.50-27,929.91-11,286.81

Finding the Fourth Proportional to 20,239.50, 27,929.91 and 11,286.81

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Solution

The fourth proportional to 20,239.50, 27,929.91 and 11,286.81 is: 15,575.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.50 : 27,929.91 = 11,286.81 : x
  2. Step 2: Convert to fraction form
    20,239.50/27,929.91 = 11,286.81/x
  3. Step 3: Cross multiply
    20,239.50x = 27,929.91 × 11,286.81
  4. Step 4: Simplify right side
    20,239.50x = 315,239,587.49
  5. Step 5: Solve for x
    x = 315,239,587.49/20,239.50
  6. Step 6: Final answer
    x = 15,575.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.