Home / 13,921.12-20,858.22-6,891.76

Finding the Fourth Proportional to 13,921.12, 20,858.22 and 6,891.76

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Solution

The fourth proportional to 13,921.12, 20,858.22 and 6,891.76 is: 10,326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.12 : 20,858.22 = 6,891.76 : x
  2. Step 2: Convert to fraction form
    13,921.12/20,858.22 = 6,891.76/x
  3. Step 3: Cross multiply
    13,921.12x = 20,858.22 × 6,891.76
  4. Step 4: Simplify right side
    13,921.12x = 143,749,846.27
  5. Step 5: Solve for x
    x = 143,749,846.27/13,921.12
  6. Step 6: Final answer
    x = 10,326.03

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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.