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Finding the Fourth Proportional to 12,441, 18,661.65 and 5,324.28

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Solution

The fourth proportional to 12,441, 18,661.65 and 5,324.28 is: 7,986.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,441 : 18,661.65 = 5,324.28 : x
  2. Step 2: Convert to fraction form
    12,441/18,661.65 = 5,324.28/x
  3. Step 3: Cross multiply
    12,441x = 18,661.65 × 5,324.28
  4. Step 4: Simplify right side
    12,441x = 99,359,849.86
  5. Step 5: Solve for x
    x = 99,359,849.86/12,441
  6. Step 6: Final answer
    x = 7,986.48

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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.