Home / 20,993.19-28,969.29-11,561.73

Finding the Fourth Proportional to 20,993.19, 28,969.29 and 11,561.73

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Solution

The fourth proportional to 20,993.19, 28,969.29 and 11,561.73 is: 15,954.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.19 : 28,969.29 = 11,561.73 : x
  2. Step 2: Convert to fraction form
    20,993.19/28,969.29 = 11,561.73/x
  3. Step 3: Cross multiply
    20,993.19x = 28,969.29 × 11,561.73
  4. Step 4: Simplify right side
    20,993.19x = 334,935,109.27
  5. Step 5: Solve for x
    x = 334,935,109.27/20,993.19
  6. Step 6: Final answer
    x = 15,954.46

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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.