Home / 31,720.44-43,754.41-20,404.69

Finding the Fourth Proportional to 31,720.44, 43,754.41 and 20,404.69

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Solution

The fourth proportional to 31,720.44, 43,754.41 and 20,404.69 is: 28,145.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,720.44 : 43,754.41 = 20,404.69 : x
  2. Step 2: Convert to fraction form
    31,720.44/43,754.41 = 20,404.69/x
  3. Step 3: Cross multiply
    31,720.44x = 43,754.41 × 20,404.69
  4. Step 4: Simplify right side
    31,720.44x = 892,795,172.18
  5. Step 5: Solve for x
    x = 892,795,172.18/31,720.44
  6. Step 6: Final answer
    x = 28,145.74

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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.