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Finding the Fourth Proportional to 12,355.60, 18,515.06 and 6,494.44

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Solution

The fourth proportional to 12,355.60, 18,515.06 and 6,494.44 is: 9,732.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.60 : 18,515.06 = 6,494.44 : x
  2. Step 2: Convert to fraction form
    12,355.60/18,515.06 = 6,494.44/x
  3. Step 3: Cross multiply
    12,355.60x = 18,515.06 × 6,494.44
  4. Step 4: Simplify right side
    12,355.60x = 120,244,853.69
  5. Step 5: Solve for x
    x = 120,244,853.69/12,355.60
  6. Step 6: Final answer
    x = 9,732.02

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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.