Home / 28,811.20-43,201.20-12,997.75

Finding the Fourth Proportional to 28,811.20, 43,201.20 and 12,997.75

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Solution

The fourth proportional to 28,811.20, 43,201.20 and 12,997.75 is: 19,489.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,811.20 : 43,201.20 = 12,997.75 : x
  2. Step 2: Convert to fraction form
    28,811.20/43,201.20 = 12,997.75/x
  3. Step 3: Cross multiply
    28,811.20x = 43,201.20 × 12,997.75
  4. Step 4: Simplify right side
    28,811.20x = 561,518,397.30
  5. Step 5: Solve for x
    x = 561,518,397.30/28,811.20
  6. Step 6: Final answer
    x = 19,489.59

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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.