Home / 28,181.22-38,861.67-20,628.78

Finding the Fourth Proportional to 28,181.22, 38,861.67 and 20,628.78

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Solution

The fourth proportional to 28,181.22, 38,861.67 and 20,628.78 is: 28,446.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.22 : 38,861.67 = 20,628.78 : x
  2. Step 2: Convert to fraction form
    28,181.22/38,861.67 = 20,628.78/x
  3. Step 3: Cross multiply
    28,181.22x = 38,861.67 × 20,628.78
  4. Step 4: Simplify right side
    28,181.22x = 801,668,840.86
  5. Step 5: Solve for x
    x = 801,668,840.86/28,181.22
  6. Step 6: Final answer
    x = 28,446.92

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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.