Home / 20,015.72-27,589.88-15,760.04

Finding the Fourth Proportional to 20,015.72, 27,589.88 and 15,760.04

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Solution

The fourth proportional to 20,015.72, 27,589.88 and 15,760.04 is: 21,723.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.72 : 27,589.88 = 15,760.04 : x
  2. Step 2: Convert to fraction form
    20,015.72/27,589.88 = 15,760.04/x
  3. Step 3: Cross multiply
    20,015.72x = 27,589.88 × 15,760.04
  4. Step 4: Simplify right side
    20,015.72x = 434,817,513.85
  5. Step 5: Solve for x
    x = 434,817,513.85/20,015.72
  6. Step 6: Final answer
    x = 21,723.80

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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.