Home / 20,493.53-28,280.31-11,418.68

Finding the Fourth Proportional to 20,493.53, 28,280.31 and 11,418.68

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Solution

The fourth proportional to 20,493.53, 28,280.31 and 11,418.68 is: 15,757.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.53 : 28,280.31 = 11,418.68 : x
  2. Step 2: Convert to fraction form
    20,493.53/28,280.31 = 11,418.68/x
  3. Step 3: Cross multiply
    20,493.53x = 28,280.31 × 11,418.68
  4. Step 4: Simplify right side
    20,493.53x = 322,923,880.89
  5. Step 5: Solve for x
    x = 322,923,880.89/20,493.53
  6. Step 6: Final answer
    x = 15,757.36

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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.