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Finding the Fourth Proportional to 13,393.68, 18,481.08 and 8,357.08

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Solution

The fourth proportional to 13,393.68, 18,481.08 and 8,357.08 is: 11,531.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.68 : 18,481.08 = 8,357.08 : x
  2. Step 2: Convert to fraction form
    13,393.68/18,481.08 = 8,357.08/x
  3. Step 3: Cross multiply
    13,393.68x = 18,481.08 × 8,357.08
  4. Step 4: Simplify right side
    13,393.68x = 154,447,864.05
  5. Step 5: Solve for x
    x = 154,447,864.05/13,393.68
  6. Step 6: Final answer
    x = 11,531.40

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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.