Home / 20,983.67-28,950.15-11,907.96

Finding the Fourth Proportional to 20,983.67, 28,950.15 and 11,907.96

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Solution

The fourth proportional to 20,983.67, 28,950.15 and 11,907.96 is: 16,428.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.67 : 28,950.15 = 11,907.96 : x
  2. Step 2: Convert to fraction form
    20,983.67/28,950.15 = 11,907.96/x
  3. Step 3: Cross multiply
    20,983.67x = 28,950.15 × 11,907.96
  4. Step 4: Simplify right side
    20,983.67x = 344,737,228.19
  5. Step 5: Solve for x
    x = 344,737,228.19/20,983.67
  6. Step 6: Final answer
    x = 16,428.83

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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.