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Finding the Fourth Proportional to 7,725.88, 11,489.43 and 7,479.84

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Solution

The fourth proportional to 7,725.88, 11,489.43 and 7,479.84 is: 11,123.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,725.88 : 11,489.43 = 7,479.84 : x
  2. Step 2: Convert to fraction form
    7,725.88/11,489.43 = 7,479.84/x
  3. Step 3: Cross multiply
    7,725.88x = 11,489.43 × 7,479.84
  4. Step 4: Simplify right side
    7,725.88x = 85,939,098.09
  5. Step 5: Solve for x
    x = 85,939,098.09/7,725.88
  6. Step 6: Final answer
    x = 11,123.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.