Home / 20,425.43-28,200.15-13,629.17

Finding the Fourth Proportional to 20,425.43, 28,200.15 and 13,629.17

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Solution

The fourth proportional to 20,425.43, 28,200.15 and 13,629.17 is: 18,816.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.43 : 28,200.15 = 13,629.17 : x
  2. Step 2: Convert to fraction form
    20,425.43/28,200.15 = 13,629.17/x
  3. Step 3: Cross multiply
    20,425.43x = 28,200.15 × 13,629.17
  4. Step 4: Simplify right side
    20,425.43x = 384,344,497.37
  5. Step 5: Solve for x
    x = 384,344,497.37/20,425.43
  6. Step 6: Final answer
    x = 18,816.96

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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.