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Finding the Fourth Proportional to 7,725.50, 11,488.87 and 7,479.47

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Solution

The fourth proportional to 7,725.50, 11,488.87 and 7,479.47 is: 11,122.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,725.50 : 11,488.87 = 7,479.47 : x
  2. Step 2: Convert to fraction form
    7,725.50/11,488.87 = 7,479.47/x
  3. Step 3: Cross multiply
    7,725.50x = 11,488.87 × 7,479.47
  4. Step 4: Simplify right side
    7,725.50x = 85,930,582.36
  5. Step 5: Solve for x
    x = 85,930,582.36/7,725.50
  6. Step 6: Final answer
    x = 11,122.98

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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.