Home / 20,278.26-28,127.16-19,738.80

Finding the Fourth Proportional to 20,278.26, 28,127.16 and 19,738.80

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Solution

The fourth proportional to 20,278.26, 28,127.16 and 19,738.80 is: 27,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.26 : 28,127.16 = 19,738.80 : x
  2. Step 2: Convert to fraction form
    20,278.26/28,127.16 = 19,738.80/x
  3. Step 3: Cross multiply
    20,278.26x = 28,127.16 × 19,738.80
  4. Step 4: Simplify right side
    20,278.26x = 555,196,385.81
  5. Step 5: Solve for x
    x = 555,196,385.81/20,278.26
  6. Step 6: Final answer
    x = 27,378.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.