Home / 20,211.32-27,890.20-11,136.30

Finding the Fourth Proportional to 20,211.32, 27,890.20 and 11,136.30

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Solution

The fourth proportional to 20,211.32, 27,890.20 and 11,136.30 is: 15,367.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.32 : 27,890.20 = 11,136.30 : x
  2. Step 2: Convert to fraction form
    20,211.32/27,890.20 = 11,136.30/x
  3. Step 3: Cross multiply
    20,211.32x = 27,890.20 × 11,136.30
  4. Step 4: Simplify right side
    20,211.32x = 310,593,634.26
  5. Step 5: Solve for x
    x = 310,593,634.26/20,211.32
  6. Step 6: Final answer
    x = 15,367.31

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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.