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Finding the Fourth Proportional to 13,662.73, 18,854.63 and 7,694.51

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Solution

The fourth proportional to 13,662.73, 18,854.63 and 7,694.51 is: 10,618.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.73 : 18,854.63 = 7,694.51 : x
  2. Step 2: Convert to fraction form
    13,662.73/18,854.63 = 7,694.51/x
  3. Step 3: Cross multiply
    13,662.73x = 18,854.63 × 7,694.51
  4. Step 4: Simplify right side
    13,662.73x = 145,077,064.04
  5. Step 5: Solve for x
    x = 145,077,064.04/13,662.73
  6. Step 6: Final answer
    x = 10,618.46

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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.