Home / 18,669.72-28,012.20-8,141.28

Finding the Fourth Proportional to 18,669.72, 28,012.20 and 8,141.28

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Solution

The fourth proportional to 18,669.72, 28,012.20 and 8,141.28 is: 12,215.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669.72 : 28,012.20 = 8,141.28 : x
  2. Step 2: Convert to fraction form
    18,669.72/28,012.20 = 8,141.28/x
  3. Step 3: Cross multiply
    18,669.72x = 28,012.20 × 8,141.28
  4. Step 4: Simplify right side
    18,669.72x = 228,055,163.62
  5. Step 5: Solve for x
    x = 228,055,163.62/18,669.72
  6. Step 6: Final answer
    x = 12,215.24

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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.