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Finding the Fourth Proportional to 8,921.08, 12,311.14 and 5,195.08

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Solution

The fourth proportional to 8,921.08, 12,311.14 and 5,195.08 is: 7,169.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.08 : 12,311.14 = 5,195.08 : x
  2. Step 2: Convert to fraction form
    8,921.08/12,311.14 = 5,195.08/x
  3. Step 3: Cross multiply
    8,921.08x = 12,311.14 × 5,195.08
  4. Step 4: Simplify right side
    8,921.08x = 63,957,357.19
  5. Step 5: Solve for x
    x = 63,957,357.19/8,921.08
  6. Step 6: Final answer
    x = 7,169.24

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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.