Home / 13,387.25-18,474.81-7,418.36

Finding the Fourth Proportional to 13,387.25, 18,474.81 and 7,418.36

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Solution

The fourth proportional to 13,387.25, 18,474.81 and 7,418.36 is: 10,237.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.25 : 18,474.81 = 7,418.36 : x
  2. Step 2: Convert to fraction form
    13,387.25/18,474.81 = 7,418.36/x
  3. Step 3: Cross multiply
    13,387.25x = 18,474.81 × 7,418.36
  4. Step 4: Simplify right side
    13,387.25x = 137,052,791.51
  5. Step 5: Solve for x
    x = 137,052,791.51/13,387.25
  6. Step 6: Final answer
    x = 10,237.56

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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.