Home / 20,676.30-28,537.83-13,603.38

Finding the Fourth Proportional to 20,676.30, 28,537.83 and 13,603.38

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Solution

The fourth proportional to 20,676.30, 28,537.83 and 13,603.38 is: 18,775.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.30 : 28,537.83 = 13,603.38 : x
  2. Step 2: Convert to fraction form
    20,676.30/28,537.83 = 13,603.38/x
  3. Step 3: Cross multiply
    20,676.30x = 28,537.83 × 13,603.38
  4. Step 4: Simplify right side
    20,676.30x = 388,210,945.87
  5. Step 5: Solve for x
    x = 388,210,945.87/20,676.30
  6. Step 6: Final answer
    x = 18,775.65

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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.