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Finding the Fourth Proportional to 7,984.69, 11,019.22 and 4,447.90

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Solution

The fourth proportional to 7,984.69, 11,019.22 and 4,447.90 is: 6,138.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,984.69 : 11,019.22 = 4,447.90 : x
  2. Step 2: Convert to fraction form
    7,984.69/11,019.22 = 4,447.90/x
  3. Step 3: Cross multiply
    7,984.69x = 11,019.22 × 4,447.90
  4. Step 4: Simplify right side
    7,984.69x = 49,012,405.07
  5. Step 5: Solve for x
    x = 49,012,405.07/7,984.69
  6. Step 6: Final answer
    x = 6,138.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.