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Finding the Fourth Proportional to 3,820.47, 5,272.47 and 2,142.43

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Solution

The fourth proportional to 3,820.47, 5,272.47 and 2,142.43 is: 2,956.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.47 : 5,272.47 = 2,142.43 : x
  2. Step 2: Convert to fraction form
    3,820.47/5,272.47 = 2,142.43/x
  3. Step 3: Cross multiply
    3,820.47x = 5,272.47 × 2,142.43
  4. Step 4: Simplify right side
    3,820.47x = 11,295,897.90
  5. Step 5: Solve for x
    x = 11,295,897.90/3,820.47
  6. Step 6: Final answer
    x = 2,956.68

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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.