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Finding the Fourth Proportional to 6,891.14, 9,509.72 and 3,747.32

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Solution

The fourth proportional to 6,891.14, 9,509.72 and 3,747.32 is: 5,171.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.14 : 9,509.72 = 3,747.32 : x
  2. Step 2: Convert to fraction form
    6,891.14/9,509.72 = 3,747.32/x
  3. Step 3: Cross multiply
    6,891.14x = 9,509.72 × 3,747.32
  4. Step 4: Simplify right side
    6,891.14x = 35,635,968.99
  5. Step 5: Solve for x
    x = 35,635,968.99/6,891.14
  6. Step 6: Final answer
    x = 5,171.28

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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.