Home / 5,161.72-7,123.18-2,803.86

Finding the Fourth Proportional to 5,161.72, 7,123.18 and 2,803.86

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Solution

The fourth proportional to 5,161.72, 7,123.18 and 2,803.86 is: 3,869.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,161.72 : 7,123.18 = 2,803.86 : x
  2. Step 2: Convert to fraction form
    5,161.72/7,123.18 = 2,803.86/x
  3. Step 3: Cross multiply
    5,161.72x = 7,123.18 × 2,803.86
  4. Step 4: Simplify right side
    5,161.72x = 19,972,399.47
  5. Step 5: Solve for x
    x = 19,972,399.47/5,161.72
  6. Step 6: Final answer
    x = 3,869.33

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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.