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Finding the Fourth Proportional to 13,369.71, 18,454.20 and 8,654.31

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Solution

The fourth proportional to 13,369.71, 18,454.20 and 8,654.31 is: 11,945.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,369.71 : 18,454.20 = 8,654.31 : x
  2. Step 2: Convert to fraction form
    13,369.71/18,454.20 = 8,654.31/x
  3. Step 3: Cross multiply
    13,369.71x = 18,454.20 × 8,654.31
  4. Step 4: Simplify right side
    13,369.71x = 159,708,367.60
  5. Step 5: Solve for x
    x = 159,708,367.60/13,369.71
  6. Step 6: Final answer
    x = 11,945.54

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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.