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Finding the Fourth Proportional to 13,393.89, 18,486.63 and 8,669.97

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Solution

The fourth proportional to 13,393.89, 18,486.63 and 8,669.97 is: 11,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.89 : 18,486.63 = 8,669.97 : x
  2. Step 2: Convert to fraction form
    13,393.89/18,486.63 = 8,669.97/x
  3. Step 3: Cross multiply
    13,393.89x = 18,486.63 × 8,669.97
  4. Step 4: Simplify right side
    13,393.89x = 160,278,527.50
  5. Step 5: Solve for x
    x = 160,278,527.50/13,393.89
  6. Step 6: Final answer
    x = 11,966.54

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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.