Home / 21,245.25-29,320.26-11,815.65

Finding the Fourth Proportional to 21,245.25, 29,320.26 and 11,815.65

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Solution

The fourth proportional to 21,245.25, 29,320.26 and 11,815.65 is: 16,306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.25 : 29,320.26 = 11,815.65 : x
  2. Step 2: Convert to fraction form
    21,245.25/29,320.26 = 11,815.65/x
  3. Step 3: Cross multiply
    21,245.25x = 29,320.26 × 11,815.65
  4. Step 4: Simplify right side
    21,245.25x = 346,437,930.07
  5. Step 5: Solve for x
    x = 346,437,930.07/21,245.25
  6. Step 6: Final answer
    x = 16,306.61

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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.