Home / 20,372.54-28,114.01-11,420.05

Finding the Fourth Proportional to 20,372.54, 28,114.01 and 11,420.05

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Solution

The fourth proportional to 20,372.54, 28,114.01 and 11,420.05 is: 15,759.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.54 : 28,114.01 = 11,420.05 : x
  2. Step 2: Convert to fraction form
    20,372.54/28,114.01 = 11,420.05/x
  3. Step 3: Cross multiply
    20,372.54x = 28,114.01 × 11,420.05
  4. Step 4: Simplify right side
    20,372.54x = 321,063,399.90
  5. Step 5: Solve for x
    x = 321,063,399.90/20,372.54
  6. Step 6: Final answer
    x = 15,759.62

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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.