Home / 5,213.38-7,820.12-1,317.79

Finding the Fourth Proportional to 5,213.38, 7,820.12 and 1,317.79

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Solution

The fourth proportional to 5,213.38, 7,820.12 and 1,317.79 is: 1,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,213.38 : 7,820.12 = 1,317.79 : x
  2. Step 2: Convert to fraction form
    5,213.38/7,820.12 = 1,317.79/x
  3. Step 3: Cross multiply
    5,213.38x = 7,820.12 × 1,317.79
  4. Step 4: Simplify right side
    5,213.38x = 10,305,236.83
  5. Step 5: Solve for x
    x = 10,305,236.83/5,213.38
  6. Step 6: Final answer
    x = 1,976.69

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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.