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Finding the Fourth Proportional to 13,662.48, 18,854.92 and 8,355.63

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Solution

The fourth proportional to 13,662.48, 18,854.92 and 8,355.63 is: 11,531.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.48 : 18,854.92 = 8,355.63 : x
  2. Step 2: Convert to fraction form
    13,662.48/18,854.92 = 8,355.63/x
  3. Step 3: Cross multiply
    13,662.48x = 18,854.92 × 8,355.63
  4. Step 4: Simplify right side
    13,662.48x = 157,544,620.04
  5. Step 5: Solve for x
    x = 157,544,620.04/13,662.48
  6. Step 6: Final answer
    x = 11,531.19

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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.