Home / 7,241.20-9,987.69-6,645.61

Finding the Fourth Proportional to 7,241.20, 9,987.69 and 6,645.61

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Solution

The fourth proportional to 7,241.20, 9,987.69 and 6,645.61 is: 9,166.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,241.20 : 9,987.69 = 6,645.61 : x
  2. Step 2: Convert to fraction form
    7,241.20/9,987.69 = 6,645.61/x
  3. Step 3: Cross multiply
    7,241.20x = 9,987.69 × 6,645.61
  4. Step 4: Simplify right side
    7,241.20x = 66,374,292.54
  5. Step 5: Solve for x
    x = 66,374,292.54/7,241.20
  6. Step 6: Final answer
    x = 9,166.21

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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.