Home / 20,803.38-28,721.37-13,542.36

Finding the Fourth Proportional to 20,803.38, 28,721.37 and 13,542.36

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Solution

The fourth proportional to 20,803.38, 28,721.37 and 13,542.36 is: 18,696.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.38 : 28,721.37 = 13,542.36 : x
  2. Step 2: Convert to fraction form
    20,803.38/28,721.37 = 13,542.36/x
  3. Step 3: Cross multiply
    20,803.38x = 28,721.37 × 13,542.36
  4. Step 4: Simplify right side
    20,803.38x = 388,955,132.23
  5. Step 5: Solve for x
    x = 388,955,132.23/20,803.38
  6. Step 6: Final answer
    x = 18,696.73

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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.