Home / 27,620.80-38,114.38-15,520.36

Finding the Fourth Proportional to 27,620.80, 38,114.38 and 15,520.36

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Solution

The fourth proportional to 27,620.80, 38,114.38 and 15,520.36 is: 21,416.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,620.80 : 38,114.38 = 15,520.36 : x
  2. Step 2: Convert to fraction form
    27,620.80/38,114.38 = 15,520.36/x
  3. Step 3: Cross multiply
    27,620.80x = 38,114.38 × 15,520.36
  4. Step 4: Simplify right side
    27,620.80x = 591,548,898.78
  5. Step 5: Solve for x
    x = 591,548,898.78/27,620.80
  6. Step 6: Final answer
    x = 21,416.79

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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.