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Finding the Fourth Proportional to 7,919.78, 11,880.68 and 3,700.08

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Solution

The fourth proportional to 7,919.78, 11,880.68 and 3,700.08 is: 5,550.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.78 : 11,880.68 = 3,700.08 : x
  2. Step 2: Convert to fraction form
    7,919.78/11,880.68 = 3,700.08/x
  3. Step 3: Cross multiply
    7,919.78x = 11,880.68 × 3,700.08
  4. Step 4: Simplify right side
    7,919.78x = 43,959,447.95
  5. Step 5: Solve for x
    x = 43,959,447.95/7,919.78
  6. Step 6: Final answer
    x = 5,550.59

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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.