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Finding the Fourth Proportional to 8,585.21, 12,879.20 and 4,203

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Solution

The fourth proportional to 8,585.21, 12,879.20 and 4,203 is: 6,305.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.21 : 12,879.20 = 4,203 : x
  2. Step 2: Convert to fraction form
    8,585.21/12,879.20 = 4,203/x
  3. Step 3: Cross multiply
    8,585.21x = 12,879.20 × 4,203
  4. Step 4: Simplify right side
    8,585.21x = 54,131,256.59
  5. Step 5: Solve for x
    x = 54,131,256.59/8,585.21
  6. Step 6: Final answer
    x = 6,305.18

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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.