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Finding the Fourth Proportional to 13,662.51, 18,854.22 and 7,998.31

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Solution

The fourth proportional to 13,662.51, 18,854.22 and 7,998.31 is: 11,037.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.51 : 18,854.22 = 7,998.31 : x
  2. Step 2: Convert to fraction form
    13,662.51/18,854.22 = 7,998.31/x
  3. Step 3: Cross multiply
    13,662.51x = 18,854.22 × 7,998.31
  4. Step 4: Simplify right side
    13,662.51x = 150,801,904.94
  5. Step 5: Solve for x
    x = 150,801,904.94/13,662.51
  6. Step 6: Final answer
    x = 11,037.65

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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.