Home / 20,772.20-31,158.34-5,189.83

Finding the Fourth Proportional to 20,772.20, 31,158.34 and 5,189.83

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Solution

The fourth proportional to 20,772.20, 31,158.34 and 5,189.83 is: 7,784.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.20 : 31,158.34 = 5,189.83 : x
  2. Step 2: Convert to fraction form
    20,772.20/31,158.34 = 5,189.83/x
  3. Step 3: Cross multiply
    20,772.20x = 31,158.34 × 5,189.83
  4. Step 4: Simplify right side
    20,772.20x = 161,706,396.81
  5. Step 5: Solve for x
    x = 161,706,396.81/20,772.20
  6. Step 6: Final answer
    x = 7,784.75

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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.