Home / 21,550.39-29,739.36-12,118.75

Finding the Fourth Proportional to 21,550.39, 29,739.36 and 12,118.75

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Solution

The fourth proportional to 21,550.39, 29,739.36 and 12,118.75 is: 16,723.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,550.39 : 29,739.36 = 12,118.75 : x
  2. Step 2: Convert to fraction form
    21,550.39/29,739.36 = 12,118.75/x
  3. Step 3: Cross multiply
    21,550.39x = 29,739.36 × 12,118.75
  4. Step 4: Simplify right side
    21,550.39x = 360,403,869
  5. Step 5: Solve for x
    x = 360,403,869/21,550.39
  6. Step 6: Final answer
    x = 16,723.77

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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.