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Finding the Fourth Proportional to 11,168.16, 15,411 and 6,691.08

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Solution

The fourth proportional to 11,168.16, 15,411 and 6,691.08 is: 9,233.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,168.16 : 15,411 = 6,691.08 : x
  2. Step 2: Convert to fraction form
    11,168.16/15,411 = 6,691.08/x
  3. Step 3: Cross multiply
    11,168.16x = 15,411 × 6,691.08
  4. Step 4: Simplify right side
    11,168.16x = 103,116,233.88
  5. Step 5: Solve for x
    x = 103,116,233.88/11,168.16
  6. Step 6: Final answer
    x = 9,233.05

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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.