Home / 20,082.87-30,120.86-5,291.91

Finding the Fourth Proportional to 20,082.87, 30,120.86 and 5,291.91

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Solution

The fourth proportional to 20,082.87, 30,120.86 and 5,291.91 is: 7,936.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,082.87 : 30,120.86 = 5,291.91 : x
  2. Step 2: Convert to fraction form
    20,082.87/30,120.86 = 5,291.91/x
  3. Step 3: Cross multiply
    20,082.87x = 30,120.86 × 5,291.91
  4. Step 4: Simplify right side
    20,082.87x = 159,396,893.47
  5. Step 5: Solve for x
    x = 159,396,893.47/20,082.87
  6. Step 6: Final answer
    x = 7,936.96

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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.