Home / 20,805.38-28,724.13-13,544.36

Finding the Fourth Proportional to 20,805.38, 28,724.13 and 13,544.36

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Solution

The fourth proportional to 20,805.38, 28,724.13 and 13,544.36 is: 18,699.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.38 : 28,724.13 = 13,544.36 : x
  2. Step 2: Convert to fraction form
    20,805.38/28,724.13 = 13,544.36/x
  3. Step 3: Cross multiply
    20,805.38x = 28,724.13 × 13,544.36
  4. Step 4: Simplify right side
    20,805.38x = 389,049,957.41
  5. Step 5: Solve for x
    x = 389,049,957.41/20,805.38
  6. Step 6: Final answer
    x = 18,699.49

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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.