Home / 20,103.40-27,735.78-13,018.60

Finding the Fourth Proportional to 20,103.40, 27,735.78 and 13,018.60

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Solution

The fourth proportional to 20,103.40, 27,735.78 and 13,018.60 is: 17,961.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.40 : 27,735.78 = 13,018.60 : x
  2. Step 2: Convert to fraction form
    20,103.40/27,735.78 = 13,018.60/x
  3. Step 3: Cross multiply
    20,103.40x = 27,735.78 × 13,018.60
  4. Step 4: Simplify right side
    20,103.40x = 361,081,025.51
  5. Step 5: Solve for x
    x = 361,081,025.51/20,103.40
  6. Step 6: Final answer
    x = 17,961.19

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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.