Home / 31,722.09-43,756.64-20,406.32

Finding the Fourth Proportional to 31,722.09, 43,756.64 and 20,406.32

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Solution

The fourth proportional to 31,722.09, 43,756.64 and 20,406.32 is: 28,147.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,722.09 : 43,756.64 = 20,406.32 : x
  2. Step 2: Convert to fraction form
    31,722.09/43,756.64 = 20,406.32/x
  3. Step 3: Cross multiply
    31,722.09x = 43,756.64 × 20,406.32
  4. Step 4: Simplify right side
    31,722.09x = 892,912,081.85
  5. Step 5: Solve for x
    x = 892,912,081.85/31,722.09
  6. Step 6: Final answer
    x = 28,147.96

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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.