Home / 20,211.50-27,890.76-11,136.56

Finding the Fourth Proportional to 20,211.50, 27,890.76 and 11,136.56

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Solution

The fourth proportional to 20,211.50, 27,890.76 and 11,136.56 is: 15,367.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.50 : 27,890.76 = 11,136.56 : x
  2. Step 2: Convert to fraction form
    20,211.50/27,890.76 = 11,136.56/x
  3. Step 3: Cross multiply
    20,211.50x = 27,890.76 × 11,136.56
  4. Step 4: Simplify right side
    20,211.50x = 310,607,122.19
  5. Step 5: Solve for x
    x = 310,607,122.19/20,211.50
  6. Step 6: Final answer
    x = 15,367.84

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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.