Home / 20,840.48-28,759.36-11,408.48

Finding the Fourth Proportional to 20,840.48, 28,759.36 and 11,408.48

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Solution

The fourth proportional to 20,840.48, 28,759.36 and 11,408.48 is: 15,743.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.48 : 28,759.36 = 11,408.48 : x
  2. Step 2: Convert to fraction form
    20,840.48/28,759.36 = 11,408.48/x
  3. Step 3: Cross multiply
    20,840.48x = 28,759.36 × 11,408.48
  4. Step 4: Simplify right side
    20,840.48x = 328,100,583.37
  5. Step 5: Solve for x
    x = 328,100,583.37/20,840.48
  6. Step 6: Final answer
    x = 15,743.43

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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.