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Finding the Fourth Proportional to 8,691.36, 11,981.56 and 6,203.04

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Solution

The fourth proportional to 8,691.36, 11,981.56 and 6,203.04 is: 8,551.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.36 : 11,981.56 = 6,203.04 : x
  2. Step 2: Convert to fraction form
    8,691.36/11,981.56 = 6,203.04/x
  3. Step 3: Cross multiply
    8,691.36x = 11,981.56 × 6,203.04
  4. Step 4: Simplify right side
    8,691.36x = 74,322,095.94
  5. Step 5: Solve for x
    x = 74,322,095.94/8,691.36
  6. Step 6: Final answer
    x = 8,551.26

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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.