Home / 13,540.25-18,685.39-7,571.87

Finding the Fourth Proportional to 13,540.25, 18,685.39 and 7,571.87

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Solution

The fourth proportional to 13,540.25, 18,685.39 and 7,571.87 is: 10,449.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.25 : 18,685.39 = 7,571.87 : x
  2. Step 2: Convert to fraction form
    13,540.25/18,685.39 = 7,571.87/x
  3. Step 3: Cross multiply
    13,540.25x = 18,685.39 × 7,571.87
  4. Step 4: Simplify right side
    13,540.25x = 141,483,212.69
  5. Step 5: Solve for x
    x = 141,483,212.69/13,540.25
  6. Step 6: Final answer
    x = 10,449.08

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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.