Home / 20,851.12-28,774.54-11,898.82

Finding the Fourth Proportional to 20,851.12, 28,774.54 and 11,898.82

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Solution

The fourth proportional to 20,851.12, 28,774.54 and 11,898.82 is: 16,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.12 : 28,774.54 = 11,898.82 : x
  2. Step 2: Convert to fraction form
    20,851.12/28,774.54 = 11,898.82/x
  3. Step 3: Cross multiply
    20,851.12x = 28,774.54 × 11,898.82
  4. Step 4: Simplify right side
    20,851.12x = 342,383,072.04
  5. Step 5: Solve for x
    x = 342,383,072.04/20,851.12
  6. Step 6: Final answer
    x = 16,420.37

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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.