Home / 20,840.89-28,761.14-11,409.46

Finding the Fourth Proportional to 20,840.89, 28,761.14 and 11,409.46

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Solution

The fourth proportional to 20,840.89, 28,761.14 and 11,409.46 is: 15,745.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.89 : 28,761.14 = 11,409.46 : x
  2. Step 2: Convert to fraction form
    20,840.89/28,761.14 = 11,409.46/x
  3. Step 3: Cross multiply
    20,840.89x = 28,761.14 × 11,409.46
  4. Step 4: Simplify right side
    20,840.89x = 328,149,076.38
  5. Step 5: Solve for x
    x = 328,149,076.38/20,840.89
  6. Step 6: Final answer
    x = 15,745.44

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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.