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Finding the Fourth Proportional to 13,751.67, 20,628.22 and 5,318.16

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Solution

The fourth proportional to 13,751.67, 20,628.22 and 5,318.16 is: 7,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.67 : 20,628.22 = 5,318.16 : x
  2. Step 2: Convert to fraction form
    13,751.67/20,628.22 = 5,318.16/x
  3. Step 3: Cross multiply
    13,751.67x = 20,628.22 × 5,318.16
  4. Step 4: Simplify right side
    13,751.67x = 109,704,174.48
  5. Step 5: Solve for x
    x = 109,704,174.48/13,751.67
  6. Step 6: Final answer
    x = 7,977.52

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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.