Home / 20,401.22-28,153.42-11,448.90

Finding the Fourth Proportional to 20,401.22, 28,153.42 and 11,448.90

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Solution

The fourth proportional to 20,401.22, 28,153.42 and 11,448.90 is: 15,799.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.22 : 28,153.42 = 11,448.90 : x
  2. Step 2: Convert to fraction form
    20,401.22/28,153.42 = 11,448.90/x
  3. Step 3: Cross multiply
    20,401.22x = 28,153.42 × 11,448.90
  4. Step 4: Simplify right side
    20,401.22x = 322,325,690.24
  5. Step 5: Solve for x
    x = 322,325,690.24/20,401.22
  6. Step 6: Final answer
    x = 15,799.33

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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.