Home / 20,763.50-31,145.36-5,181.12

Finding the Fourth Proportional to 20,763.50, 31,145.36 and 5,181.12

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Solution

The fourth proportional to 20,763.50, 31,145.36 and 5,181.12 is: 7,771.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.50 : 31,145.36 = 5,181.12 : x
  2. Step 2: Convert to fraction form
    20,763.50/31,145.36 = 5,181.12/x
  3. Step 3: Cross multiply
    20,763.50x = 31,145.36 × 5,181.12
  4. Step 4: Simplify right side
    20,763.50x = 161,367,821.70
  5. Step 5: Solve for x
    x = 161,367,821.70/20,763.50
  6. Step 6: Final answer
    x = 7,771.71

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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.