Home / 21,182.09-29,231.32-11,622.79

Finding the Fourth Proportional to 21,182.09, 29,231.32 and 11,622.79

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Solution

The fourth proportional to 21,182.09, 29,231.32 and 11,622.79 is: 16,039.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.09 : 29,231.32 = 11,622.79 : x
  2. Step 2: Convert to fraction form
    21,182.09/29,231.32 = 11,622.79/x
  3. Step 3: Cross multiply
    21,182.09x = 29,231.32 × 11,622.79
  4. Step 4: Simplify right side
    21,182.09x = 339,749,506.71
  5. Step 5: Solve for x
    x = 339,749,506.71/21,182.09
  6. Step 6: Final answer
    x = 16,039.47

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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.