Home / 13,357.21-20,137.25-12,642.79

Finding the Fourth Proportional to 13,357.21, 20,137.25 and 12,642.79

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Solution

The fourth proportional to 13,357.21, 20,137.25 and 12,642.79 is: 19,060.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,357.21 : 20,137.25 = 12,642.79 : x
  2. Step 2: Convert to fraction form
    13,357.21/20,137.25 = 12,642.79/x
  3. Step 3: Cross multiply
    13,357.21x = 20,137.25 × 12,642.79
  4. Step 4: Simplify right side
    13,357.21x = 254,591,022.93
  5. Step 5: Solve for x
    x = 254,591,022.93/13,357.21
  6. Step 6: Final answer
    x = 19,060.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.