Home / 20,968.95-28,936.62-11,408.43

Finding the Fourth Proportional to 20,968.95, 28,936.62 and 11,408.43

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Solution

The fourth proportional to 20,968.95, 28,936.62 and 11,408.43 is: 15,743.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.95 : 28,936.62 = 11,408.43 : x
  2. Step 2: Convert to fraction form
    20,968.95/28,936.62 = 11,408.43/x
  3. Step 3: Cross multiply
    20,968.95x = 28,936.62 × 11,408.43
  4. Step 4: Simplify right side
    20,968.95x = 330,121,403.71
  5. Step 5: Solve for x
    x = 330,121,403.71/20,968.95
  6. Step 6: Final answer
    x = 15,743.34

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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.