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Finding the Fourth Proportional to 11,361.74, 15,640.90 and 9,369.14

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Solution

The fourth proportional to 11,361.74, 15,640.90 and 9,369.14 is: 12,897.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,361.74 : 15,640.90 = 9,369.14 : x
  2. Step 2: Convert to fraction form
    11,361.74/15,640.90 = 9,369.14/x
  3. Step 3: Cross multiply
    11,361.74x = 15,640.90 × 9,369.14
  4. Step 4: Simplify right side
    11,361.74x = 146,541,680.20
  5. Step 5: Solve for x
    x = 146,541,680.20/11,361.74
  6. Step 6: Final answer
    x = 12,897.83

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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.