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Finding the Fourth Proportional to 12,481.05, 18,703.08 and 5,454.63

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Solution

The fourth proportional to 12,481.05, 18,703.08 and 5,454.63 is: 8,173.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481.05 : 18,703.08 = 5,454.63 : x
  2. Step 2: Convert to fraction form
    12,481.05/18,703.08 = 5,454.63/x
  3. Step 3: Cross multiply
    12,481.05x = 18,703.08 × 5,454.63
  4. Step 4: Simplify right side
    12,481.05x = 102,018,381.26
  5. Step 5: Solve for x
    x = 102,018,381.26/12,481.05
  6. Step 6: Final answer
    x = 8,173.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.