Home / 20,778.58-28,670.58-11,825.55

Finding the Fourth Proportional to 20,778.58, 28,670.58 and 11,825.55

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Solution

The fourth proportional to 20,778.58, 28,670.58 and 11,825.55 is: 16,317.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.58 : 28,670.58 = 11,825.55 : x
  2. Step 2: Convert to fraction form
    20,778.58/28,670.58 = 11,825.55/x
  3. Step 3: Cross multiply
    20,778.58x = 28,670.58 × 11,825.55
  4. Step 4: Simplify right side
    20,778.58x = 339,045,377.32
  5. Step 5: Solve for x
    x = 339,045,377.32/20,778.58
  6. Step 6: Final answer
    x = 16,317.06

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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.