Home / 13,751.06-18,973.31-7,781.42

Finding the Fourth Proportional to 13,751.06, 18,973.31 and 7,781.42

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Solution

The fourth proportional to 13,751.06, 18,973.31 and 7,781.42 is: 10,736.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.06 : 18,973.31 = 7,781.42 : x
  2. Step 2: Convert to fraction form
    13,751.06/18,973.31 = 7,781.42/x
  3. Step 3: Cross multiply
    13,751.06x = 18,973.31 × 7,781.42
  4. Step 4: Simplify right side
    13,751.06x = 147,639,302.43
  5. Step 5: Solve for x
    x = 147,639,302.43/13,751.06
  6. Step 6: Final answer
    x = 10,736.58

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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.