Home / 13,279.80-19,912.83-3,918.63

Finding the Fourth Proportional to 13,279.80, 19,912.83 and 3,918.63

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Solution

The fourth proportional to 13,279.80, 19,912.83 and 3,918.63 is: 5,875.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.80 : 19,912.83 = 3,918.63 : x
  2. Step 2: Convert to fraction form
    13,279.80/19,912.83 = 3,918.63/x
  3. Step 3: Cross multiply
    13,279.80x = 19,912.83 × 3,918.63
  4. Step 4: Simplify right side
    13,279.80x = 78,031,013.02
  5. Step 5: Solve for x
    x = 78,031,013.02/13,279.80
  6. Step 6: Final answer
    x = 5,875.92

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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.