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Finding the Fourth Proportional to 6,991.52, 9,647.91 and 4,007.48

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Solution

The fourth proportional to 6,991.52, 9,647.91 and 4,007.48 is: 5,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.52 : 9,647.91 = 4,007.48 : x
  2. Step 2: Convert to fraction form
    6,991.52/9,647.91 = 4,007.48/x
  3. Step 3: Cross multiply
    6,991.52x = 9,647.91 × 4,007.48
  4. Step 4: Simplify right side
    6,991.52x = 38,663,758.13
  5. Step 5: Solve for x
    x = 38,663,758.13/6,991.52
  6. Step 6: Final answer
    x = 5,530.10

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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.