Home / 13,447.82-20,174.08-5,128.58

Finding the Fourth Proportional to 13,447.82, 20,174.08 and 5,128.58

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Solution

The fourth proportional to 13,447.82, 20,174.08 and 5,128.58 is: 7,693.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.82 : 20,174.08 = 5,128.58 : x
  2. Step 2: Convert to fraction form
    13,447.82/20,174.08 = 5,128.58/x
  3. Step 3: Cross multiply
    13,447.82x = 20,174.08 × 5,128.58
  4. Step 4: Simplify right side
    13,447.82x = 103,464,383.21
  5. Step 5: Solve for x
    x = 103,464,383.21/13,447.82
  6. Step 6: Final answer
    x = 7,693.77

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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.