Home / 20,568.40-28,394.26-13,018.39

Finding the Fourth Proportional to 20,568.40, 28,394.26 and 13,018.39

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Solution

The fourth proportional to 20,568.40, 28,394.26 and 13,018.39 is: 17,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.40 : 28,394.26 = 13,018.39 : x
  2. Step 2: Convert to fraction form
    20,568.40/28,394.26 = 13,018.39/x
  3. Step 3: Cross multiply
    20,568.40x = 28,394.26 × 13,018.39
  4. Step 4: Simplify right side
    20,568.40x = 369,647,550.44
  5. Step 5: Solve for x
    x = 369,647,550.44/20,568.40
  6. Step 6: Final answer
    x = 17,971.62

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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.