Home / 20,914.85-28,858.72-11,840.15

Finding the Fourth Proportional to 20,914.85, 28,858.72 and 11,840.15

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Solution

The fourth proportional to 20,914.85, 28,858.72 and 11,840.15 is: 16,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.85 : 28,858.72 = 11,840.15 : x
  2. Step 2: Convert to fraction form
    20,914.85/28,858.72 = 11,840.15/x
  3. Step 3: Cross multiply
    20,914.85x = 28,858.72 × 11,840.15
  4. Step 4: Simplify right side
    20,914.85x = 341,691,573.61
  5. Step 5: Solve for x
    x = 341,691,573.61/20,914.85
  6. Step 6: Final answer
    x = 16,337.27

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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.