Home / 20,111.44-30,136.38-8,418.28

Finding the Fourth Proportional to 20,111.44, 30,136.38 and 8,418.28

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Solution

The fourth proportional to 20,111.44, 30,136.38 and 8,418.28 is: 12,614.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.44 : 30,136.38 = 8,418.28 : x
  2. Step 2: Convert to fraction form
    20,111.44/30,136.38 = 8,418.28/x
  3. Step 3: Cross multiply
    20,111.44x = 30,136.38 × 8,418.28
  4. Step 4: Simplify right side
    20,111.44x = 253,696,485.03
  5. Step 5: Solve for x
    x = 253,696,485.03/20,111.44
  6. Step 6: Final answer
    x = 12,614.54

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1.5x scale

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.