Home / 31,200.72-43,027.22-20,429.52

Finding the Fourth Proportional to 31,200.72, 43,027.22 and 20,429.52

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Solution

The fourth proportional to 31,200.72, 43,027.22 and 20,429.52 is: 28,173.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,200.72 : 43,027.22 = 20,429.52 : x
  2. Step 2: Convert to fraction form
    31,200.72/43,027.22 = 20,429.52/x
  3. Step 3: Cross multiply
    31,200.72x = 43,027.22 × 20,429.52
  4. Step 4: Simplify right side
    31,200.72x = 879,025,451.53
  5. Step 5: Solve for x
    x = 879,025,451.53/31,200.72
  6. Step 6: Final answer
    x = 28,173.24

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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.