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Finding the Fourth Proportional to 13,659.88, 18,850.98 and 8,357.68

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Solution

The fourth proportional to 13,659.88, 18,850.98 and 8,357.68 is: 11,533.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.88 : 18,850.98 = 8,357.68 : x
  2. Step 2: Convert to fraction form
    13,659.88/18,850.98 = 8,357.68/x
  3. Step 3: Cross multiply
    13,659.88x = 18,850.98 × 8,357.68
  4. Step 4: Simplify right side
    13,659.88x = 157,550,458.53
  5. Step 5: Solve for x
    x = 157,550,458.53/13,659.88
  6. Step 6: Final answer
    x = 11,533.81

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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.