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Finding the Fourth Proportional to 3,714.41, 5,124.78 and 2,121

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Solution

The fourth proportional to 3,714.41, 5,124.78 and 2,121 is: 2,926.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,714.41 : 5,124.78 = 2,121 : x
  2. Step 2: Convert to fraction form
    3,714.41/5,124.78 = 2,121/x
  3. Step 3: Cross multiply
    3,714.41x = 5,124.78 × 2,121
  4. Step 4: Simplify right side
    3,714.41x = 10,869,658.38
  5. Step 5: Solve for x
    x = 10,869,658.38/3,714.41
  6. Step 6: Final answer
    x = 2,926.35

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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.