Home / 19,857.20-27,415.77-12,311.54

Finding the Fourth Proportional to 19,857.20, 27,415.77 and 12,311.54

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Solution

The fourth proportional to 19,857.20, 27,415.77 and 12,311.54 is: 16,997.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.20 : 27,415.77 = 12,311.54 : x
  2. Step 2: Convert to fraction form
    19,857.20/27,415.77 = 12,311.54/x
  3. Step 3: Cross multiply
    19,857.20x = 27,415.77 × 12,311.54
  4. Step 4: Simplify right side
    19,857.20x = 337,530,422.76
  5. Step 5: Solve for x
    x = 337,530,422.76/19,857.20
  6. Step 6: Final answer
    x = 16,997.89

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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.