Home / 20,431.73-28,195.59-11,356.85

Finding the Fourth Proportional to 20,431.73, 28,195.59 and 11,356.85

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Solution

The fourth proportional to 20,431.73, 28,195.59 and 11,356.85 is: 15,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,431.73 : 28,195.59 = 11,356.85 : x
  2. Step 2: Convert to fraction form
    20,431.73/28,195.59 = 11,356.85/x
  3. Step 3: Cross multiply
    20,431.73x = 28,195.59 × 11,356.85
  4. Step 4: Simplify right side
    20,431.73x = 320,213,135.73
  5. Step 5: Solve for x
    x = 320,213,135.73/20,431.73
  6. Step 6: Final answer
    x = 15,672.35

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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.