Home / 7,112.12-9,813.75-3,967.70

Finding the Fourth Proportional to 7,112.12, 9,813.75 and 3,967.70

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Solution

The fourth proportional to 7,112.12, 9,813.75 and 3,967.70 is: 5,474.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.12 : 9,813.75 = 3,967.70 : x
  2. Step 2: Convert to fraction form
    7,112.12/9,813.75 = 3,967.70/x
  3. Step 3: Cross multiply
    7,112.12x = 9,813.75 × 3,967.70
  4. Step 4: Simplify right side
    7,112.12x = 38,938,015.88
  5. Step 5: Solve for x
    x = 38,938,015.88/7,112.12
  6. Step 6: Final answer
    x = 5,474.88

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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.