Home / 20,828.79-28,743.61-11,268.65

Finding the Fourth Proportional to 20,828.79, 28,743.61 and 11,268.65

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Solution

The fourth proportional to 20,828.79, 28,743.61 and 11,268.65 is: 15,550.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.79 : 28,743.61 = 11,268.65 : x
  2. Step 2: Convert to fraction form
    20,828.79/28,743.61 = 11,268.65/x
  3. Step 3: Cross multiply
    20,828.79x = 28,743.61 × 11,268.65
  4. Step 4: Simplify right side
    20,828.79x = 323,901,680.83
  5. Step 5: Solve for x
    x = 323,901,680.83/20,828.79
  6. Step 6: Final answer
    x = 15,550.67

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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.