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Finding the Fourth Proportional to 8,513.63, 12,751.98 and 4,121.88

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Solution

The fourth proportional to 8,513.63, 12,751.98 and 4,121.88 is: 6,173.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,513.63 : 12,751.98 = 4,121.88 : x
  2. Step 2: Convert to fraction form
    8,513.63/12,751.98 = 4,121.88/x
  3. Step 3: Cross multiply
    8,513.63x = 12,751.98 × 4,121.88
  4. Step 4: Simplify right side
    8,513.63x = 52,562,131.32
  5. Step 5: Solve for x
    x = 52,562,131.32/8,513.63
  6. Step 6: Final answer
    x = 6,173.88

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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.