Home / 20,810.92-28,719.66-11,379.64

Finding the Fourth Proportional to 20,810.92, 28,719.66 and 11,379.64

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Solution

The fourth proportional to 20,810.92, 28,719.66 and 11,379.64 is: 15,704.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.92 : 28,719.66 = 11,379.64 : x
  2. Step 2: Convert to fraction form
    20,810.92/28,719.66 = 11,379.64/x
  3. Step 3: Cross multiply
    20,810.92x = 28,719.66 × 11,379.64
  4. Step 4: Simplify right side
    20,810.92x = 326,819,391.72
  5. Step 5: Solve for x
    x = 326,819,391.72/20,810.92
  6. Step 6: Final answer
    x = 15,704.23

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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.