Home / 20,829.94-28,745.32-11,398.50

Finding the Fourth Proportional to 20,829.94, 28,745.32 and 11,398.50

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Solution

The fourth proportional to 20,829.94, 28,745.32 and 11,398.50 is: 15,729.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.94 : 28,745.32 = 11,398.50 : x
  2. Step 2: Convert to fraction form
    20,829.94/28,745.32 = 11,398.50/x
  3. Step 3: Cross multiply
    20,829.94x = 28,745.32 × 11,398.50
  4. Step 4: Simplify right side
    20,829.94x = 327,653,501.52
  5. Step 5: Solve for x
    x = 327,653,501.52/20,829.94
  6. Step 6: Final answer
    x = 15,729.93

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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.