Home / 5,209.22-7,814.36-1,921.55

Finding the Fourth Proportional to 5,209.22, 7,814.36 and 1,921.55

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Solution

The fourth proportional to 5,209.22, 7,814.36 and 1,921.55 is: 2,882.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,209.22 : 7,814.36 = 1,921.55 : x
  2. Step 2: Convert to fraction form
    5,209.22/7,814.36 = 1,921.55/x
  3. Step 3: Cross multiply
    5,209.22x = 7,814.36 × 1,921.55
  4. Step 4: Simplify right side
    5,209.22x = 15,015,649.19
  5. Step 5: Solve for x
    x = 15,015,649.19/5,209.22
  6. Step 6: Final answer
    x = 2,882.51

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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.