Home / 13,279.21-19,919-3,418.27

Finding the Fourth Proportional to 13,279.21, 19,919 and 3,418.27

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Solution

The fourth proportional to 13,279.21, 19,919 and 3,418.27 is: 5,127.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.21 : 19,919 = 3,418.27 : x
  2. Step 2: Convert to fraction form
    13,279.21/19,919 = 3,418.27/x
  3. Step 3: Cross multiply
    13,279.21x = 19,919 × 3,418.27
  4. Step 4: Simplify right side
    13,279.21x = 68,088,520.13
  5. Step 5: Solve for x
    x = 68,088,520.13/13,279.21
  6. Step 6: Final answer
    x = 5,127.45

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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.