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Finding the Fourth Proportional to 7,186.64, 9,891.88 and 5,087.12

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Solution

The fourth proportional to 7,186.64, 9,891.88 and 5,087.12 is: 7,002.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,186.64 : 9,891.88 = 5,087.12 : x
  2. Step 2: Convert to fraction form
    7,186.64/9,891.88 = 5,087.12/x
  3. Step 3: Cross multiply
    7,186.64x = 9,891.88 × 5,087.12
  4. Step 4: Simplify right side
    7,186.64x = 50,321,180.59
  5. Step 5: Solve for x
    x = 50,321,180.59/7,186.64
  6. Step 6: Final answer
    x = 7,002.05

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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.