Home / 27,965.36-38,560.20-20,879.84

Finding the Fourth Proportional to 27,965.36, 38,560.20 and 20,879.84

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Solution

The fourth proportional to 27,965.36, 38,560.20 and 20,879.84 is: 28,790.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,965.36 : 38,560.20 = 20,879.84 : x
  2. Step 2: Convert to fraction form
    27,965.36/38,560.20 = 20,879.84/x
  3. Step 3: Cross multiply
    27,965.36x = 38,560.20 × 20,879.84
  4. Step 4: Simplify right side
    27,965.36x = 805,130,806.37
  5. Step 5: Solve for x
    x = 805,130,806.37/27,965.36
  6. Step 6: Final answer
    x = 28,790.29

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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.