Home / 20,519.49-28,319.15-11,907.57

Finding the Fourth Proportional to 20,519.49, 28,319.15 and 11,907.57

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Solution

The fourth proportional to 20,519.49, 28,319.15 and 11,907.57 is: 16,433.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.49 : 28,319.15 = 11,907.57 : x
  2. Step 2: Convert to fraction form
    20,519.49/28,319.15 = 11,907.57/x
  3. Step 3: Cross multiply
    20,519.49x = 28,319.15 × 11,907.57
  4. Step 4: Simplify right side
    20,519.49x = 337,212,396.93
  5. Step 5: Solve for x
    x = 337,212,396.93/20,519.49
  6. Step 6: Final answer
    x = 16,433.76

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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.