Home / 7,112.45-9,812.88-4,087.22

Finding the Fourth Proportional to 7,112.45, 9,812.88 and 4,087.22

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Solution

The fourth proportional to 7,112.45, 9,812.88 and 4,087.22 is: 5,639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.45 : 9,812.88 = 4,087.22 : x
  2. Step 2: Convert to fraction form
    7,112.45/9,812.88 = 4,087.22/x
  3. Step 3: Cross multiply
    7,112.45x = 9,812.88 × 4,087.22
  4. Step 4: Simplify right side
    7,112.45x = 40,107,350.33
  5. Step 5: Solve for x
    x = 40,107,350.33/7,112.45
  6. Step 6: Final answer
    x = 5,639.03

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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.