Home / 13,820.76-20,728.26-3,957.36

Finding the Fourth Proportional to 13,820.76, 20,728.26 and 3,957.36

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Solution

The fourth proportional to 13,820.76, 20,728.26 and 3,957.36 is: 5,935.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.76 : 20,728.26 = 3,957.36 : x
  2. Step 2: Convert to fraction form
    13,820.76/20,728.26 = 3,957.36/x
  3. Step 3: Cross multiply
    13,820.76x = 20,728.26 × 3,957.36
  4. Step 4: Simplify right side
    13,820.76x = 82,029,186.99
  5. Step 5: Solve for x
    x = 82,029,186.99/13,820.76
  6. Step 6: Final answer
    x = 5,935.22

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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.