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Finding the Fourth Proportional to 11,168.28, 15,407.31 and 6,918.21

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Solution

The fourth proportional to 11,168.28, 15,407.31 and 6,918.21 is: 9,544.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,168.28 : 15,407.31 = 6,918.21 : x
  2. Step 2: Convert to fraction form
    11,168.28/15,407.31 = 6,918.21/x
  3. Step 3: Cross multiply
    11,168.28x = 15,407.31 × 6,918.21
  4. Step 4: Simplify right side
    11,168.28x = 106,591,032.06
  5. Step 5: Solve for x
    x = 106,591,032.06/11,168.28
  6. Step 6: Final answer
    x = 9,544.09

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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.