Home / 3,820.47-5,272.46-2,141.78

Finding the Fourth Proportional to 3,820.47, 5,272.46 and 2,141.78

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Solution

The fourth proportional to 3,820.47, 5,272.46 and 2,141.78 is: 2,955.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,820.47 : 5,272.46 = 2,141.78 : x
  2. Step 2: Convert to fraction form
    3,820.47/5,272.46 = 2,141.78/x
  3. Step 3: Cross multiply
    3,820.47x = 5,272.46 × 2,141.78
  4. Step 4: Simplify right side
    3,820.47x = 11,292,420.34
  5. Step 5: Solve for x
    x = 11,292,420.34/3,820.47
  6. Step 6: Final answer
    x = 2,955.77

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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.