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Finding the Fourth Proportional to 9,908.91, 13,672.05 and 6,722.64

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Solution

The fourth proportional to 9,908.91, 13,672.05 and 6,722.64 is: 9,275.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,908.91 : 13,672.05 = 6,722.64 : x
  2. Step 2: Convert to fraction form
    9,908.91/13,672.05 = 6,722.64/x
  3. Step 3: Cross multiply
    9,908.91x = 13,672.05 × 6,722.64
  4. Step 4: Simplify right side
    9,908.91x = 91,912,270.21
  5. Step 5: Solve for x
    x = 91,912,270.21/9,908.91
  6. Step 6: Final answer
    x = 9,275.72

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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.