Home / 20,175.35-30,278.69-13,978.81

Finding the Fourth Proportional to 20,175.35, 30,278.69 and 13,978.81

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Solution

The fourth proportional to 20,175.35, 30,278.69 and 13,978.81 is: 20,979.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,175.35 : 30,278.69 = 13,978.81 : x
  2. Step 2: Convert to fraction form
    20,175.35/30,278.69 = 13,978.81/x
  3. Step 3: Cross multiply
    20,175.35x = 30,278.69 × 13,978.81
  4. Step 4: Simplify right side
    20,175.35x = 423,259,833.27
  5. Step 5: Solve for x
    x = 423,259,833.27/20,175.35
  6. Step 6: Final answer
    x = 20,979.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.