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Finding the Fourth Proportional to 11,685.68, 17,531.48 and 3,894.64

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Solution

The fourth proportional to 11,685.68, 17,531.48 and 3,894.64 is: 5,842.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,685.68 : 17,531.48 = 3,894.64 : x
  2. Step 2: Convert to fraction form
    11,685.68/17,531.48 = 3,894.64/x
  3. Step 3: Cross multiply
    11,685.68x = 17,531.48 × 3,894.64
  4. Step 4: Simplify right side
    11,685.68x = 68,278,803.27
  5. Step 5: Solve for x
    x = 68,278,803.27/11,685.68
  6. Step 6: Final answer
    x = 5,842.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.