Home / 20,431.94-28,195.86-11,357.26

Finding the Fourth Proportional to 20,431.94, 28,195.86 and 11,357.26

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Solution

The fourth proportional to 20,431.94, 28,195.86 and 11,357.26 is: 15,672.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.94 : 28,195.86 = 11,357.26 : x
  2. Step 2: Convert to fraction form
    20,431.94/28,195.86 = 11,357.26/x
  3. Step 3: Cross multiply
    20,431.94x = 28,195.86 × 11,357.26
  4. Step 4: Simplify right side
    20,431.94x = 320,227,712.94
  5. Step 5: Solve for x
    x = 320,227,712.94/20,431.94
  6. Step 6: Final answer
    x = 15,672.90

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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.