Home / 20,830.90-28,747.14-11,879.26

Finding the Fourth Proportional to 20,830.90, 28,747.14 and 11,879.26

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Solution

The fourth proportional to 20,830.90, 28,747.14 and 11,879.26 is: 16,393.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.90 : 28,747.14 = 11,879.26 : x
  2. Step 2: Convert to fraction form
    20,830.90/28,747.14 = 11,879.26/x
  3. Step 3: Cross multiply
    20,830.90x = 28,747.14 × 11,879.26
  4. Step 4: Simplify right side
    20,830.90x = 341,494,750.32
  5. Step 5: Solve for x
    x = 341,494,750.32/20,830.90
  6. Step 6: Final answer
    x = 16,393.66

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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.