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Finding the Fourth Proportional to 13,617.81, 20,421.81 and 4,850.97

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Solution

The fourth proportional to 13,617.81, 20,421.81 and 4,850.97 is: 7,274.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.81 : 20,421.81 = 4,850.97 : x
  2. Step 2: Convert to fraction form
    13,617.81/20,421.81 = 4,850.97/x
  3. Step 3: Cross multiply
    13,617.81x = 20,421.81 × 4,850.97
  4. Step 4: Simplify right side
    13,617.81x = 99,065,587.66
  5. Step 5: Solve for x
    x = 99,065,587.66/13,617.81
  6. Step 6: Final answer
    x = 7,274.71

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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.