Home / 20,493.97-28,282.43-11,420.15

Finding the Fourth Proportional to 20,493.97, 28,282.43 and 11,420.15

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Solution

The fourth proportional to 20,493.97, 28,282.43 and 11,420.15 is: 15,760.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.97 : 28,282.43 = 11,420.15 : x
  2. Step 2: Convert to fraction form
    20,493.97/28,282.43 = 11,420.15/x
  3. Step 3: Cross multiply
    20,493.97x = 28,282.43 × 11,420.15
  4. Step 4: Simplify right side
    20,493.97x = 322,989,480.10
  5. Step 5: Solve for x
    x = 322,989,480.10/20,493.97
  6. Step 6: Final answer
    x = 15,760.22

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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.