Home / 13,686.37-20,530.87-3,825.63

Finding the Fourth Proportional to 13,686.37, 20,530.87 and 3,825.63

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Solution

The fourth proportional to 13,686.37, 20,530.87 and 3,825.63 is: 5,738.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.37 : 20,530.87 = 3,825.63 : x
  2. Step 2: Convert to fraction form
    13,686.37/20,530.87 = 3,825.63/x
  3. Step 3: Cross multiply
    13,686.37x = 20,530.87 × 3,825.63
  4. Step 4: Simplify right side
    13,686.37x = 78,543,502.63
  5. Step 5: Solve for x
    x = 78,543,502.63/13,686.37
  6. Step 6: Final answer
    x = 5,738.81

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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.