Home / 13,540.24-18,686.31-7,571.75

Finding the Fourth Proportional to 13,540.24, 18,686.31 and 7,571.75

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Solution

The fourth proportional to 13,540.24, 18,686.31 and 7,571.75 is: 10,449.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.24 : 18,686.31 = 7,571.75 : x
  2. Step 2: Convert to fraction form
    13,540.24/18,686.31 = 7,571.75/x
  3. Step 3: Cross multiply
    13,540.24x = 18,686.31 × 7,571.75
  4. Step 4: Simplify right side
    13,540.24x = 141,488,067.74
  5. Step 5: Solve for x
    x = 141,488,067.74/13,540.24
  6. Step 6: Final answer
    x = 10,449.45

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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.