Home / 20,822.92-28,735.81-11,391.48

Finding the Fourth Proportional to 20,822.92, 28,735.81 and 11,391.48

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Solution

The fourth proportional to 20,822.92, 28,735.81 and 11,391.48 is: 15,720.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.92 : 28,735.81 = 11,391.48 : x
  2. Step 2: Convert to fraction form
    20,822.92/28,735.81 = 11,391.48/x
  3. Step 3: Cross multiply
    20,822.92x = 28,735.81 × 11,391.48
  4. Step 4: Simplify right side
    20,822.92x = 327,343,376.42
  5. Step 5: Solve for x
    x = 327,343,376.42/20,822.92
  6. Step 6: Final answer
    x = 15,720.34

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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.