Home / 13,425.03-20,129.40-11,451.69

Finding the Fourth Proportional to 13,425.03, 20,129.40 and 11,451.69

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Solution

The fourth proportional to 13,425.03, 20,129.40 and 11,451.69 is: 17,170.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.03 : 20,129.40 = 11,451.69 : x
  2. Step 2: Convert to fraction form
    13,425.03/20,129.40 = 11,451.69/x
  3. Step 3: Cross multiply
    13,425.03x = 20,129.40 × 11,451.69
  4. Step 4: Simplify right side
    13,425.03x = 230,515,648.69
  5. Step 5: Solve for x
    x = 230,515,648.69/13,425.03
  6. Step 6: Final answer
    x = 17,170.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.