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Finding the Fourth Proportional to 9,913.01, 13,672.79 and 8,418.56

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Solution

The fourth proportional to 9,913.01, 13,672.79 and 8,418.56 is: 11,611.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,913.01 : 13,672.79 = 8,418.56 : x
  2. Step 2: Convert to fraction form
    9,913.01/13,672.79 = 8,418.56/x
  3. Step 3: Cross multiply
    9,913.01x = 13,672.79 × 8,418.56
  4. Step 4: Simplify right side
    9,913.01x = 115,105,195.07
  5. Step 5: Solve for x
    x = 115,105,195.07/9,913.01
  6. Step 6: Final answer
    x = 11,611.53

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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.