Home / 20,428.22-28,187.87-11,474.00

Finding the Fourth Proportional to 20,428.22, 28,187.87 and 11,474.00

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Solution

The fourth proportional to 20,428.22, 28,187.87 and 11,474.00 is: 15,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.22 : 28,187.87 = 11,474.00 : x
  2. Step 2: Convert to fraction form
    20,428.22/28,187.87 = 11,474.00/x
  3. Step 3: Cross multiply
    20,428.22x = 28,187.87 × 11,474.00
  4. Step 4: Simplify right side
    20,428.22x = 323,427,662.16
  5. Step 5: Solve for x
    x = 323,427,662.16/20,428.22
  6. Step 6: Final answer
    x = 15,832.40

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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.