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Finding the Fourth Proportional to 15,555, 21,465.90 and 8,481.48

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Solution

The fourth proportional to 15,555, 21,465.90 and 8,481.48 is: 11,704.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555 : 21,465.90 = 8,481.48 : x
  2. Step 2: Convert to fraction form
    15,555/21,465.90 = 8,481.48/x
  3. Step 3: Cross multiply
    15,555x = 21,465.90 × 8,481.48
  4. Step 4: Simplify right side
    15,555x = 182,062,601.53
  5. Step 5: Solve for x
    x = 182,062,601.53/15,555
  6. Step 6: Final answer
    x = 11,704.44

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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.