Home / 20,942.88-28,889.64-13,272.12

Finding the Fourth Proportional to 20,942.88, 28,889.64 and 13,272.12

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Solution

The fourth proportional to 20,942.88, 28,889.64 and 13,272.12 is: 18,308.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.88 : 28,889.64 = 13,272.12 : x
  2. Step 2: Convert to fraction form
    20,942.88/28,889.64 = 13,272.12/x
  3. Step 3: Cross multiply
    20,942.88x = 28,889.64 × 13,272.12
  4. Step 4: Simplify right side
    20,942.88x = 383,426,768.84
  5. Step 5: Solve for x
    x = 383,426,768.84/20,942.88
  6. Step 6: Final answer
    x = 18,308.22

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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.