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Finding the Fourth Proportional to 9,709.72, 13,400.64 and 5,517.16

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Solution

The fourth proportional to 9,709.72, 13,400.64 and 5,517.16 is: 7,614.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,709.72 : 13,400.64 = 5,517.16 : x
  2. Step 2: Convert to fraction form
    9,709.72/13,400.64 = 5,517.16/x
  3. Step 3: Cross multiply
    9,709.72x = 13,400.64 × 5,517.16
  4. Step 4: Simplify right side
    9,709.72x = 73,933,474.98
  5. Step 5: Solve for x
    x = 73,933,474.98/9,709.72
  6. Step 6: Final answer
    x = 7,614.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.