Home / 13,679.89-20,519.53-3,818.95

Finding the Fourth Proportional to 13,679.89, 20,519.53 and 3,818.95

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Solution

The fourth proportional to 13,679.89, 20,519.53 and 3,818.95 is: 5,728.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.89 : 20,519.53 = 3,818.95 : x
  2. Step 2: Convert to fraction form
    13,679.89/20,519.53 = 3,818.95/x
  3. Step 3: Cross multiply
    13,679.89x = 20,519.53 × 3,818.95
  4. Step 4: Simplify right side
    13,679.89x = 78,362,998.25
  5. Step 5: Solve for x
    x = 78,362,998.25/13,679.89
  6. Step 6: Final answer
    x = 5,728.34

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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.