Home / 20,739.88-28,620.42-11,788.36

Finding the Fourth Proportional to 20,739.88, 28,620.42 and 11,788.36

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Solution

The fourth proportional to 20,739.88, 28,620.42 and 11,788.36 is: 16,267.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.88 : 28,620.42 = 11,788.36 : x
  2. Step 2: Convert to fraction form
    20,739.88/28,620.42 = 11,788.36/x
  3. Step 3: Cross multiply
    20,739.88x = 28,620.42 × 11,788.36
  4. Step 4: Simplify right side
    20,739.88x = 337,387,814.31
  5. Step 5: Solve for x
    x = 337,387,814.31/20,739.88
  6. Step 6: Final answer
    x = 16,267.59

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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.