Home / 20,689.26-28,579.97-19,921.14

Finding the Fourth Proportional to 20,689.26, 28,579.97 and 19,921.14

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Solution

The fourth proportional to 20,689.26, 28,579.97 and 19,921.14 is: 27,518.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.26 : 28,579.97 = 19,921.14 : x
  2. Step 2: Convert to fraction form
    20,689.26/28,579.97 = 19,921.14/x
  3. Step 3: Cross multiply
    20,689.26x = 28,579.97 × 19,921.14
  4. Step 4: Simplify right side
    20,689.26x = 569,345,633.37
  5. Step 5: Solve for x
    x = 569,345,633.37/20,689.26
  6. Step 6: Final answer
    x = 27,518.90

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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.