Home / 20,719.30-28,589.44-11,642.87

Finding the Fourth Proportional to 20,719.30, 28,589.44 and 11,642.87

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Solution

The fourth proportional to 20,719.30, 28,589.44 and 11,642.87 is: 16,065.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.30 : 28,589.44 = 11,642.87 : x
  2. Step 2: Convert to fraction form
    20,719.30/28,589.44 = 11,642.87/x
  3. Step 3: Cross multiply
    20,719.30x = 28,589.44 × 11,642.87
  4. Step 4: Simplify right side
    20,719.30x = 332,863,133.29
  5. Step 5: Solve for x
    x = 332,863,133.29/20,719.30
  6. Step 6: Final answer
    x = 16,065.37

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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.