Home / 20,822.78-28,735.54-11,391.32

Finding the Fourth Proportional to 20,822.78, 28,735.54 and 11,391.32

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Solution

The fourth proportional to 20,822.78, 28,735.54 and 11,391.32 is: 15,720.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.78 : 28,735.54 = 11,391.32 : x
  2. Step 2: Convert to fraction form
    20,822.78/28,735.54 = 11,391.32/x
  3. Step 3: Cross multiply
    20,822.78x = 28,735.54 × 11,391.32
  4. Step 4: Simplify right side
    20,822.78x = 327,335,731.51
  5. Step 5: Solve for x
    x = 327,335,731.51/20,822.78
  6. Step 6: Final answer
    x = 15,720.08

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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.