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Finding the Fourth Proportional to 5,479.52, 7,561.72 and 3,123

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Solution

The fourth proportional to 5,479.52, 7,561.72 and 3,123 is: 4,309.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.52 : 7,561.72 = 3,123 : x
  2. Step 2: Convert to fraction form
    5,479.52/7,561.72 = 3,123/x
  3. Step 3: Cross multiply
    5,479.52x = 7,561.72 × 3,123
  4. Step 4: Simplify right side
    5,479.52x = 23,615,251.56
  5. Step 5: Solve for x
    x = 23,615,251.56/5,479.52
  6. Step 6: Final answer
    x = 4,309.73

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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.