Home / 20,123.08-30,214.23-11,255.78

Finding the Fourth Proportional to 20,123.08, 30,214.23 and 11,255.78

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Solution

The fourth proportional to 20,123.08, 30,214.23 and 11,255.78 is: 16,900.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.08 : 30,214.23 = 11,255.78 : x
  2. Step 2: Convert to fraction form
    20,123.08/30,214.23 = 11,255.78/x
  3. Step 3: Cross multiply
    20,123.08x = 30,214.23 × 11,255.78
  4. Step 4: Simplify right side
    20,123.08x = 340,084,725.75
  5. Step 5: Solve for x
    x = 340,084,725.75/20,123.08
  6. Step 6: Final answer
    x = 16,900.23

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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.