Home / 20,265.42-27,979.12-13,902.68

Finding the Fourth Proportional to 20,265.42, 27,979.12 and 13,902.68

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Solution

The fourth proportional to 20,265.42, 27,979.12 and 13,902.68 is: 19,194.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,265.42 : 27,979.12 = 13,902.68 : x
  2. Step 2: Convert to fraction form
    20,265.42/27,979.12 = 13,902.68/x
  3. Step 3: Cross multiply
    20,265.42x = 27,979.12 × 13,902.68
  4. Step 4: Simplify right side
    20,265.42x = 388,984,752.04
  5. Step 5: Solve for x
    x = 388,984,752.04/20,265.42
  6. Step 6: Final answer
    x = 19,194.51

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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.