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Finding the Fourth Proportional to 13,664.11, 18,856.71 and 7,695.99

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Solution

The fourth proportional to 13,664.11, 18,856.71 and 7,695.99 is: 10,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.11 : 18,856.71 = 7,695.99 : x
  2. Step 2: Convert to fraction form
    13,664.11/18,856.71 = 7,695.99/x
  3. Step 3: Cross multiply
    13,664.11x = 18,856.71 × 7,695.99
  4. Step 4: Simplify right side
    13,664.11x = 145,120,976.91
  5. Step 5: Solve for x
    x = 145,120,976.91/13,664.11
  6. Step 6: Final answer
    x = 10,620.60

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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.