Home / 21,216.25-29,279.37-11,784.79

Finding the Fourth Proportional to 21,216.25, 29,279.37 and 11,784.79

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Solution

The fourth proportional to 21,216.25, 29,279.37 and 11,784.79 is: 16,263.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.25 : 29,279.37 = 11,784.79 : x
  2. Step 2: Convert to fraction form
    21,216.25/29,279.37 = 11,784.79/x
  3. Step 3: Cross multiply
    21,216.25x = 29,279.37 × 11,784.79
  4. Step 4: Simplify right side
    21,216.25x = 345,051,226.78
  5. Step 5: Solve for x
    x = 345,051,226.78/21,216.25
  6. Step 6: Final answer
    x = 16,263.54

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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.