Home / 7,919.40-11,866.68-4,220.64

Finding the Fourth Proportional to 7,919.40, 11,866.68 and 4,220.64

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Solution

The fourth proportional to 7,919.40, 11,866.68 and 4,220.64 is: 6,324.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.40 : 11,866.68 = 4,220.64 : x
  2. Step 2: Convert to fraction form
    7,919.40/11,866.68 = 4,220.64/x
  3. Step 3: Cross multiply
    7,919.40x = 11,866.68 × 4,220.64
  4. Step 4: Simplify right side
    7,919.40x = 50,084,984.28
  5. Step 5: Solve for x
    x = 50,084,984.28/7,919.40
  6. Step 6: Final answer
    x = 6,324.34

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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.