Home / 20,396.43-28,146.99-11,323.15

Finding the Fourth Proportional to 20,396.43, 28,146.99 and 11,323.15

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Solution

The fourth proportional to 20,396.43, 28,146.99 and 11,323.15 is: 15,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,396.43 : 28,146.99 = 11,323.15 : x
  2. Step 2: Convert to fraction form
    20,396.43/28,146.99 = 11,323.15/x
  3. Step 3: Cross multiply
    20,396.43x = 28,146.99 × 11,323.15
  4. Step 4: Simplify right side
    20,396.43x = 318,712,589.82
  5. Step 5: Solve for x
    x = 318,712,589.82/20,396.43
  6. Step 6: Final answer
    x = 15,625.90

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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.