Home / 20,518.88-28,304.96-13,724.64

Finding the Fourth Proportional to 20,518.88, 28,304.96 and 13,724.64

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Solution

The fourth proportional to 20,518.88, 28,304.96 and 13,724.64 is: 18,932.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.88 : 28,304.96 = 13,724.64 : x
  2. Step 2: Convert to fraction form
    20,518.88/28,304.96 = 13,724.64/x
  3. Step 3: Cross multiply
    20,518.88x = 28,304.96 × 13,724.64
  4. Step 4: Simplify right side
    20,518.88x = 388,475,386.21
  5. Step 5: Solve for x
    x = 388,475,386.21/20,518.88
  6. Step 6: Final answer
    x = 18,932.58

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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.