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Finding the Fourth Proportional to 12,405.05, 17,118.84 and 7,027.09

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Solution

The fourth proportional to 12,405.05, 17,118.84 and 7,027.09 is: 9,697.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.05 : 17,118.84 = 7,027.09 : x
  2. Step 2: Convert to fraction form
    12,405.05/17,118.84 = 7,027.09/x
  3. Step 3: Cross multiply
    12,405.05x = 17,118.84 × 7,027.09
  4. Step 4: Simplify right side
    12,405.05x = 120,295,612.93
  5. Step 5: Solve for x
    x = 120,295,612.93/12,405.05
  6. Step 6: Final answer
    x = 9,697.31

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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.