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Finding the Fourth Proportional to 7,489.60, 11,212.80 and 6,625.60

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Solution

The fourth proportional to 7,489.60, 11,212.80 and 6,625.60 is: 9,919.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,489.60 : 11,212.80 = 6,625.60 : x
  2. Step 2: Convert to fraction form
    7,489.60/11,212.80 = 6,625.60/x
  3. Step 3: Cross multiply
    7,489.60x = 11,212.80 × 6,625.60
  4. Step 4: Simplify right side
    7,489.60x = 74,291,527.68
  5. Step 5: Solve for x
    x = 74,291,527.68/7,489.60
  6. Step 6: Final answer
    x = 9,919.29

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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.