Home / 13,820.22-19,072.35-7,851.78

Finding the Fourth Proportional to 13,820.22, 19,072.35 and 7,851.78

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Solution

The fourth proportional to 13,820.22, 19,072.35 and 7,851.78 is: 10,835.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,820.22 : 19,072.35 = 7,851.78 : x
  2. Step 2: Convert to fraction form
    13,820.22/19,072.35 = 7,851.78/x
  3. Step 3: Cross multiply
    13,820.22x = 19,072.35 × 7,851.78
  4. Step 4: Simplify right side
    13,820.22x = 149,751,896.28
  5. Step 5: Solve for x
    x = 149,751,896.28/13,820.22
  6. Step 6: Final answer
    x = 10,835.71

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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.