Home / 20,780.69-28,670.23-11,825.94

Finding the Fourth Proportional to 20,780.69, 28,670.23 and 11,825.94

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Solution

The fourth proportional to 20,780.69, 28,670.23 and 11,825.94 is: 16,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.69 : 28,670.23 = 11,825.94 : x
  2. Step 2: Convert to fraction form
    20,780.69/28,670.23 = 11,825.94/x
  3. Step 3: Cross multiply
    20,780.69x = 28,670.23 × 11,825.94
  4. Step 4: Simplify right side
    20,780.69x = 339,052,542.06
  5. Step 5: Solve for x
    x = 339,052,542.06/20,780.69
  6. Step 6: Final answer
    x = 16,315.75

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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.