Home / 20,439.72-30,659.26-5,648.31

Finding the Fourth Proportional to 20,439.72, 30,659.26 and 5,648.31

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Solution

The fourth proportional to 20,439.72, 30,659.26 and 5,648.31 is: 8,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.72 : 30,659.26 = 5,648.31 : x
  2. Step 2: Convert to fraction form
    20,439.72/30,659.26 = 5,648.31/x
  3. Step 3: Cross multiply
    20,439.72x = 30,659.26 × 5,648.31
  4. Step 4: Simplify right side
    20,439.72x = 173,173,004.85
  5. Step 5: Solve for x
    x = 173,173,004.85/20,439.72
  6. Step 6: Final answer
    x = 8,472.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.