Home / 20,828.26-28,742.64-12,760.66

Finding the Fourth Proportional to 20,828.26, 28,742.64 and 12,760.66

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Solution

The fourth proportional to 20,828.26, 28,742.64 and 12,760.66 is: 17,609.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.26 : 28,742.64 = 12,760.66 : x
  2. Step 2: Convert to fraction form
    20,828.26/28,742.64 = 12,760.66/x
  3. Step 3: Cross multiply
    20,828.26x = 28,742.64 × 12,760.66
  4. Step 4: Simplify right side
    20,828.26x = 366,775,056.54
  5. Step 5: Solve for x
    x = 366,775,056.54/20,828.26
  6. Step 6: Final answer
    x = 17,609.49

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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.