Home / 13,757.03-18,986.28-12,912.56

Finding the Fourth Proportional to 13,757.03, 18,986.28 and 12,912.56

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Solution

The fourth proportional to 13,757.03, 18,986.28 and 12,912.56 is: 17,820.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.03 : 18,986.28 = 12,912.56 : x
  2. Step 2: Convert to fraction form
    13,757.03/18,986.28 = 12,912.56/x
  3. Step 3: Cross multiply
    13,757.03x = 18,986.28 × 12,912.56
  4. Step 4: Simplify right side
    13,757.03x = 245,161,479.68
  5. Step 5: Solve for x
    x = 245,161,479.68/13,757.03
  6. Step 6: Final answer
    x = 17,820.81

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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.