Home / 13,939.45-20,905.80-4,077.70

Finding the Fourth Proportional to 13,939.45, 20,905.80 and 4,077.70

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Solution

The fourth proportional to 13,939.45, 20,905.80 and 4,077.70 is: 6,115.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.45 : 20,905.80 = 4,077.70 : x
  2. Step 2: Convert to fraction form
    13,939.45/20,905.80 = 4,077.70/x
  3. Step 3: Cross multiply
    13,939.45x = 20,905.80 × 4,077.70
  4. Step 4: Simplify right side
    13,939.45x = 85,247,580.66
  5. Step 5: Solve for x
    x = 85,247,580.66/13,939.45
  6. Step 6: Final answer
    x = 6,115.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.