Home / 13,121.85-19,677.91-5,328.03

Finding the Fourth Proportional to 13,121.85, 19,677.91 and 5,328.03

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Solution

The fourth proportional to 13,121.85, 19,677.91 and 5,328.03 is: 7,990.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.85 : 19,677.91 = 5,328.03 : x
  2. Step 2: Convert to fraction form
    13,121.85/19,677.91 = 5,328.03/x
  3. Step 3: Cross multiply
    13,121.85x = 19,677.91 × 5,328.03
  4. Step 4: Simplify right side
    13,121.85x = 104,844,494.82
  5. Step 5: Solve for x
    x = 104,844,494.82/13,121.85
  6. Step 6: Final answer
    x = 7,990.07

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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.