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Finding the Fourth Proportional to 12,605.45, 18,908.16 and 3,840.44

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Solution

The fourth proportional to 12,605.45, 18,908.16 and 3,840.44 is: 5,760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.45 : 18,908.16 = 3,840.44 : x
  2. Step 2: Convert to fraction form
    12,605.45/18,908.16 = 3,840.44/x
  3. Step 3: Cross multiply
    12,605.45x = 18,908.16 × 3,840.44
  4. Step 4: Simplify right side
    12,605.45x = 72,615,559.45
  5. Step 5: Solve for x
    x = 72,615,559.45/12,605.45
  6. Step 6: Final answer
    x = 5,760.65

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Double scale
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Similar ratio
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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.