Home / 20,828.21-28,742.81-11,268.07

Finding the Fourth Proportional to 20,828.21, 28,742.81 and 11,268.07

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Solution

The fourth proportional to 20,828.21, 28,742.81 and 11,268.07 is: 15,549.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.21 : 28,742.81 = 11,268.07 : x
  2. Step 2: Convert to fraction form
    20,828.21/28,742.81 = 11,268.07/x
  3. Step 3: Cross multiply
    20,828.21x = 28,742.81 × 11,268.07
  4. Step 4: Simplify right side
    20,828.21x = 323,876,026.95
  5. Step 5: Solve for x
    x = 323,876,026.95/20,828.21
  6. Step 6: Final answer
    x = 15,549.87

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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.