Home / 20,840.34-28,759.66-11,408.90

Finding the Fourth Proportional to 20,840.34, 28,759.66 and 11,408.90

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Solution

The fourth proportional to 20,840.34, 28,759.66 and 11,408.90 is: 15,744.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.34 : 28,759.66 = 11,408.90 : x
  2. Step 2: Convert to fraction form
    20,840.34/28,759.66 = 11,408.90/x
  3. Step 3: Cross multiply
    20,840.34x = 28,759.66 × 11,408.90
  4. Step 4: Simplify right side
    20,840.34x = 328,116,084.97
  5. Step 5: Solve for x
    x = 328,116,084.97/20,840.34
  6. Step 6: Final answer
    x = 15,744.28

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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.