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Finding the Fourth Proportional to 8,405.51, 12,609.04 and 2,165.55

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Solution

The fourth proportional to 8,405.51, 12,609.04 and 2,165.55 is: 3,248.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.51 : 12,609.04 = 2,165.55 : x
  2. Step 2: Convert to fraction form
    8,405.51/12,609.04 = 2,165.55/x
  3. Step 3: Cross multiply
    8,405.51x = 12,609.04 × 2,165.55
  4. Step 4: Simplify right side
    8,405.51x = 27,305,481.76
  5. Step 5: Solve for x
    x = 27,305,481.76/8,405.51
  6. Step 6: Final answer
    x = 3,248.52

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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.