Home / 20,391.78-30,538.46-11,600.04

Finding the Fourth Proportional to 20,391.78, 30,538.46 and 11,600.04

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Solution

The fourth proportional to 20,391.78, 30,538.46 and 11,600.04 is: 17,372.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.78 : 30,538.46 = 11,600.04 : x
  2. Step 2: Convert to fraction form
    20,391.78/30,538.46 = 11,600.04/x
  3. Step 3: Cross multiply
    20,391.78x = 30,538.46 × 11,600.04
  4. Step 4: Simplify right side
    20,391.78x = 354,247,386.54
  5. Step 5: Solve for x
    x = 354,247,386.54/20,391.78
  6. Step 6: Final answer
    x = 17,372.07

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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.