Home / 20,860.62-28,784.88-11,907.54

Finding the Fourth Proportional to 20,860.62, 28,784.88 and 11,907.54

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Solution

The fourth proportional to 20,860.62, 28,784.88 and 11,907.54 is: 16,430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.62 : 28,784.88 = 11,907.54 : x
  2. Step 2: Convert to fraction form
    20,860.62/28,784.88 = 11,907.54/x
  3. Step 3: Cross multiply
    20,860.62x = 28,784.88 × 11,907.54
  4. Step 4: Simplify right side
    20,860.62x = 342,757,110.00
  5. Step 5: Solve for x
    x = 342,757,110.00/20,860.62
  6. Step 6: Final answer
    x = 16,430.82

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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.