Home / 20,438.88-28,199.84-11,485.44

Finding the Fourth Proportional to 20,438.88, 28,199.84 and 11,485.44

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Solution

The fourth proportional to 20,438.88, 28,199.84 and 11,485.44 is: 15,846.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.88 : 28,199.84 = 11,485.44 : x
  2. Step 2: Convert to fraction form
    20,438.88/28,199.84 = 11,485.44/x
  3. Step 3: Cross multiply
    20,438.88x = 28,199.84 × 11,485.44
  4. Step 4: Simplify right side
    20,438.88x = 323,887,570.33
  5. Step 5: Solve for x
    x = 323,887,570.33/20,438.88
  6. Step 6: Final answer
    x = 15,846.64

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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.