Home / 7,419.87-11,112.24-6,440.66

Finding the Fourth Proportional to 7,419.87, 11,112.24 and 6,440.66

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Solution

The fourth proportional to 7,419.87, 11,112.24 and 6,440.66 is: 9,645.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.87 : 11,112.24 = 6,440.66 : x
  2. Step 2: Convert to fraction form
    7,419.87/11,112.24 = 6,440.66/x
  3. Step 3: Cross multiply
    7,419.87x = 11,112.24 × 6,440.66
  4. Step 4: Simplify right side
    7,419.87x = 71,570,196.22
  5. Step 5: Solve for x
    x = 71,570,196.22/7,419.87
  6. Step 6: Final answer
    x = 9,645.75

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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.