Home / 27,979.58-38,566.58-21,919.37

Finding the Fourth Proportional to 27,979.58, 38,566.58 and 21,919.37

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Solution

The fourth proportional to 27,979.58, 38,566.58 and 21,919.37 is: 30,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.58 : 38,566.58 = 21,919.37 : x
  2. Step 2: Convert to fraction form
    27,979.58/38,566.58 = 21,919.37/x
  3. Step 3: Cross multiply
    27,979.58x = 38,566.58 × 21,919.37
  4. Step 4: Simplify right side
    27,979.58x = 845,354,834.22
  5. Step 5: Solve for x
    x = 845,354,834.22/27,979.58
  6. Step 6: Final answer
    x = 30,213.28

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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.