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Finding the Fourth Proportional to 12,520.98, 17,279.22 and 6,855.96

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Solution

The fourth proportional to 12,520.98, 17,279.22 and 6,855.96 is: 9,461.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.98 : 17,279.22 = 6,855.96 : x
  2. Step 2: Convert to fraction form
    12,520.98/17,279.22 = 6,855.96/x
  3. Step 3: Cross multiply
    12,520.98x = 17,279.22 × 6,855.96
  4. Step 4: Simplify right side
    12,520.98x = 118,465,641.15
  5. Step 5: Solve for x
    x = 118,465,641.15/12,520.98
  6. Step 6: Final answer
    x = 9,461.37

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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.