Home / 20,216.38-27,889.04-13,140.22

Finding the Fourth Proportional to 20,216.38, 27,889.04 and 13,140.22

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Solution

The fourth proportional to 20,216.38, 27,889.04 and 13,140.22 is: 18,127.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,216.38 : 27,889.04 = 13,140.22 : x
  2. Step 2: Convert to fraction form
    20,216.38/27,889.04 = 13,140.22/x
  3. Step 3: Cross multiply
    20,216.38x = 27,889.04 × 13,140.22
  4. Step 4: Simplify right side
    20,216.38x = 366,468,121.19
  5. Step 5: Solve for x
    x = 366,468,121.19/20,216.38
  6. Step 6: Final answer
    x = 18,127.29

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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.