Home / 19,217.60-28,826.40-8,121.28

Finding the Fourth Proportional to 19,217.60, 28,826.40 and 8,121.28

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Solution

The fourth proportional to 19,217.60, 28,826.40 and 8,121.28 is: 12,181.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,217.60 : 28,826.40 = 8,121.28 : x
  2. Step 2: Convert to fraction form
    19,217.60/28,826.40 = 8,121.28/x
  3. Step 3: Cross multiply
    19,217.60x = 28,826.40 × 8,121.28
  4. Step 4: Simplify right side
    19,217.60x = 234,107,265.79
  5. Step 5: Solve for x
    x = 234,107,265.79/19,217.60
  6. Step 6: Final answer
    x = 12,181.92

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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.