Home / 7,119.12-9,824.40-3,975.42

Finding the Fourth Proportional to 7,119.12, 9,824.40 and 3,975.42

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Solution

The fourth proportional to 7,119.12, 9,824.40 and 3,975.42 is: 5,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119.12 : 9,824.40 = 3,975.42 : x
  2. Step 2: Convert to fraction form
    7,119.12/9,824.40 = 3,975.42/x
  3. Step 3: Cross multiply
    7,119.12x = 9,824.40 × 3,975.42
  4. Step 4: Simplify right side
    7,119.12x = 39,056,116.25
  5. Step 5: Solve for x
    x = 39,056,116.25/7,119.12
  6. Step 6: Final answer
    x = 5,486.09

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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.