Home / 21,085.11-29,097.09-11,653.61

Finding the Fourth Proportional to 21,085.11, 29,097.09 and 11,653.61

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Solution

The fourth proportional to 21,085.11, 29,097.09 and 11,653.61 is: 16,081.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.11 : 29,097.09 = 11,653.61 : x
  2. Step 2: Convert to fraction form
    21,085.11/29,097.09 = 11,653.61/x
  3. Step 3: Cross multiply
    21,085.11x = 29,097.09 × 11,653.61
  4. Step 4: Simplify right side
    21,085.11x = 339,085,993.51
  5. Step 5: Solve for x
    x = 339,085,993.51/21,085.11
  6. Step 6: Final answer
    x = 16,081.77

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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.