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Finding the Fourth Proportional to 5,714.89, 8,572.90 and 2,156.11

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Solution

The fourth proportional to 5,714.89, 8,572.90 and 2,156.11 is: 3,234.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,714.89 : 8,572.90 = 2,156.11 : x
  2. Step 2: Convert to fraction form
    5,714.89/8,572.90 = 2,156.11/x
  3. Step 3: Cross multiply
    5,714.89x = 8,572.90 × 2,156.11
  4. Step 4: Simplify right side
    5,714.89x = 18,484,135.57
  5. Step 5: Solve for x
    x = 18,484,135.57/5,714.89
  6. Step 6: Final answer
    x = 3,234.38

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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.