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Finding the Fourth Proportional to 6,991.05, 10,485.51 and 3,479.91

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Solution

The fourth proportional to 6,991.05, 10,485.51 and 3,479.91 is: 5,219.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.05 : 10,485.51 = 3,479.91 : x
  2. Step 2: Convert to fraction form
    6,991.05/10,485.51 = 3,479.91/x
  3. Step 3: Cross multiply
    6,991.05x = 10,485.51 × 3,479.91
  4. Step 4: Simplify right side
    6,991.05x = 36,488,631.10
  5. Step 5: Solve for x
    x = 36,488,631.10/6,991.05
  6. Step 6: Final answer
    x = 5,219.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.