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Finding the Fourth Proportional to 6,891.60, 9,509.94 and 3,747.72

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Solution

The fourth proportional to 6,891.60, 9,509.94 and 3,747.72 is: 5,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891.60 : 9,509.94 = 3,747.72 : x
  2. Step 2: Convert to fraction form
    6,891.60/9,509.94 = 3,747.72/x
  3. Step 3: Cross multiply
    6,891.60x = 9,509.94 × 3,747.72
  4. Step 4: Simplify right side
    6,891.60x = 35,640,592.34
  5. Step 5: Solve for x
    x = 35,640,592.34/6,891.60
  6. Step 6: Final answer
    x = 5,171.60

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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.