Home / 20,822.94-28,735.71-11,391.51

Finding the Fourth Proportional to 20,822.94, 28,735.71 and 11,391.51

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Solution

The fourth proportional to 20,822.94, 28,735.71 and 11,391.51 is: 15,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.94 : 28,735.71 = 11,391.51 : x
  2. Step 2: Convert to fraction form
    20,822.94/28,735.71 = 11,391.51/x
  3. Step 3: Cross multiply
    20,822.94x = 28,735.71 × 11,391.51
  4. Step 4: Simplify right side
    20,822.94x = 327,343,127.82
  5. Step 5: Solve for x
    x = 327,343,127.82/20,822.94
  6. Step 6: Final answer
    x = 15,720.31

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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.