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Finding the Fourth Proportional to 13,791.66, 20,688.84 and 4,431.84

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Solution

The fourth proportional to 13,791.66, 20,688.84 and 4,431.84 is: 6,648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.66 : 20,688.84 = 4,431.84 : x
  2. Step 2: Convert to fraction form
    13,791.66/20,688.84 = 4,431.84/x
  3. Step 3: Cross multiply
    13,791.66x = 20,688.84 × 4,431.84
  4. Step 4: Simplify right side
    13,791.66x = 91,689,628.67
  5. Step 5: Solve for x
    x = 91,689,628.67/13,791.66
  6. Step 6: Final answer
    x = 6,648.19

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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.