Home / 20,355.72-28,091.04-12,396.48

Finding the Fourth Proportional to 20,355.72, 28,091.04 and 12,396.48

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Solution

The fourth proportional to 20,355.72, 28,091.04 and 12,396.48 is: 17,107.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.72 : 28,091.04 = 12,396.48 : x
  2. Step 2: Convert to fraction form
    20,355.72/28,091.04 = 12,396.48/x
  3. Step 3: Cross multiply
    20,355.72x = 28,091.04 × 12,396.48
  4. Step 4: Simplify right side
    20,355.72x = 348,230,015.54
  5. Step 5: Solve for x
    x = 348,230,015.54/20,355.72
  6. Step 6: Final answer
    x = 17,107.23

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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.