Home / 20,428.54-28,188.32-11,474.33

Finding the Fourth Proportional to 20,428.54, 28,188.32 and 11,474.33

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Solution

The fourth proportional to 20,428.54, 28,188.32 and 11,474.33 is: 15,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.54 : 28,188.32 = 11,474.33 : x
  2. Step 2: Convert to fraction form
    20,428.54/28,188.32 = 11,474.33/x
  3. Step 3: Cross multiply
    20,428.54x = 28,188.32 × 11,474.33
  4. Step 4: Simplify right side
    20,428.54x = 323,442,110.61
  5. Step 5: Solve for x
    x = 323,442,110.61/20,428.54
  6. Step 6: Final answer
    x = 15,832.85

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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.