Home / 13,290.26-19,930.70-3,927.78

Finding the Fourth Proportional to 13,290.26, 19,930.70 and 3,927.78

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Solution

The fourth proportional to 13,290.26, 19,930.70 and 3,927.78 is: 5,890.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.26 : 19,930.70 = 3,927.78 : x
  2. Step 2: Convert to fraction form
    13,290.26/19,930.70 = 3,927.78/x
  3. Step 3: Cross multiply
    13,290.26x = 19,930.70 × 3,927.78
  4. Step 4: Simplify right side
    13,290.26x = 78,283,404.85
  5. Step 5: Solve for x
    x = 78,283,404.85/13,290.26
  6. Step 6: Final answer
    x = 5,890.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.