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Finding the Fourth Proportional to 8,714.80, 13,072.20 and 2,140.90

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Solution

The fourth proportional to 8,714.80, 13,072.20 and 2,140.90 is: 3,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,714.80 : 13,072.20 = 2,140.90 : x
  2. Step 2: Convert to fraction form
    8,714.80/13,072.20 = 2,140.90/x
  3. Step 3: Cross multiply
    8,714.80x = 13,072.20 × 2,140.90
  4. Step 4: Simplify right side
    8,714.80x = 27,986,272.98
  5. Step 5: Solve for x
    x = 27,986,272.98/8,714.80
  6. Step 6: Final answer
    x = 3,211.35

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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.