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Finding the Fourth Proportional to 6,709.57, 9,979.88 and 6,687.09

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Solution

The fourth proportional to 6,709.57, 9,979.88 and 6,687.09 is: 9,946.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,709.57 : 9,979.88 = 6,687.09 : x
  2. Step 2: Convert to fraction form
    6,709.57/9,979.88 = 6,687.09/x
  3. Step 3: Cross multiply
    6,709.57x = 9,979.88 × 6,687.09
  4. Step 4: Simplify right side
    6,709.57x = 66,736,322.31
  5. Step 5: Solve for x
    x = 66,736,322.31/6,709.57
  6. Step 6: Final answer
    x = 9,946.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.