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Finding the Fourth Proportional to 13,691.62, 18,894.63 and 8,384.50

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Solution

The fourth proportional to 13,691.62, 18,894.63 and 8,384.50 is: 11,570.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.62 : 18,894.63 = 8,384.50 : x
  2. Step 2: Convert to fraction form
    13,691.62/18,894.63 = 8,384.50/x
  3. Step 3: Cross multiply
    13,691.62x = 18,894.63 × 8,384.50
  4. Step 4: Simplify right side
    13,691.62x = 158,422,025.24
  5. Step 5: Solve for x
    x = 158,422,025.24/13,691.62
  6. Step 6: Final answer
    x = 11,570.73

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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.