Home / 20,745.70-28,631.64-12,677.69

Finding the Fourth Proportional to 20,745.70, 28,631.64 and 12,677.69

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Solution

The fourth proportional to 20,745.70, 28,631.64 and 12,677.69 is: 17,496.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.70 : 28,631.64 = 12,677.69 : x
  2. Step 2: Convert to fraction form
    20,745.70/28,631.64 = 12,677.69/x
  3. Step 3: Cross multiply
    20,745.70x = 28,631.64 × 12,677.69
  4. Step 4: Simplify right side
    20,745.70x = 362,982,992.72
  5. Step 5: Solve for x
    x = 362,982,992.72/20,745.70
  6. Step 6: Final answer
    x = 17,496.79

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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.