Home / 31,351.68-43,267.23-20,722.86

Finding the Fourth Proportional to 31,351.68, 43,267.23 and 20,722.86

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Solution

The fourth proportional to 31,351.68, 43,267.23 and 20,722.86 is: 28,598.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,351.68 : 43,267.23 = 20,722.86 : x
  2. Step 2: Convert to fraction form
    31,351.68/43,267.23 = 20,722.86/x
  3. Step 3: Cross multiply
    31,351.68x = 43,267.23 × 20,722.86
  4. Step 4: Simplify right side
    31,351.68x = 896,620,749.88
  5. Step 5: Solve for x
    x = 896,620,749.88/31,351.68
  6. Step 6: Final answer
    x = 28,598.81

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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.