Home / 20,780.69-28,670.24-11,825.96

Finding the Fourth Proportional to 20,780.69, 28,670.24 and 11,825.96

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Solution

The fourth proportional to 20,780.69, 28,670.24 and 11,825.96 is: 16,315.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.69 : 28,670.24 = 11,825.96 : x
  2. Step 2: Convert to fraction form
    20,780.69/28,670.24 = 11,825.96/x
  3. Step 3: Cross multiply
    20,780.69x = 28,670.24 × 11,825.96
  4. Step 4: Simplify right side
    20,780.69x = 339,052,908.95
  5. Step 5: Solve for x
    x = 339,052,908.95/20,780.69
  6. Step 6: Final answer
    x = 16,315.77

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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.