Home / 20,396.21-28,146.70-11,443.75

Finding the Fourth Proportional to 20,396.21, 28,146.70 and 11,443.75

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Solution

The fourth proportional to 20,396.21, 28,146.70 and 11,443.75 is: 15,792.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.21 : 28,146.70 = 11,443.75 : x
  2. Step 2: Convert to fraction form
    20,396.21/28,146.70 = 11,443.75/x
  3. Step 3: Cross multiply
    20,396.21x = 28,146.70 × 11,443.75
  4. Step 4: Simplify right side
    20,396.21x = 322,103,740.91
  5. Step 5: Solve for x
    x = 322,103,740.91/20,396.21
  6. Step 6: Final answer
    x = 15,792.33

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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.