Home / 7,119.48-9,825.10-3,975.80

Finding the Fourth Proportional to 7,119.48, 9,825.10 and 3,975.80

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Solution

The fourth proportional to 7,119.48, 9,825.10 and 3,975.80 is: 5,486.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119.48 : 9,825.10 = 3,975.80 : x
  2. Step 2: Convert to fraction form
    7,119.48/9,825.10 = 3,975.80/x
  3. Step 3: Cross multiply
    7,119.48x = 9,825.10 × 3,975.80
  4. Step 4: Simplify right side
    7,119.48x = 39,062,632.58
  5. Step 5: Solve for x
    x = 39,062,632.58/7,119.48
  6. Step 6: Final answer
    x = 5,486.73

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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.