Home / 13,201.40-19,813.30-5,415.80

Finding the Fourth Proportional to 13,201.40, 19,813.30 and 5,415.80

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Solution

The fourth proportional to 13,201.40, 19,813.30 and 5,415.80 is: 8,128.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201.40 : 19,813.30 = 5,415.80 : x
  2. Step 2: Convert to fraction form
    13,201.40/19,813.30 = 5,415.80/x
  3. Step 3: Cross multiply
    13,201.40x = 19,813.30 × 5,415.80
  4. Step 4: Simplify right side
    13,201.40x = 107,304,870.14
  5. Step 5: Solve for x
    x = 107,304,870.14/13,201.40
  6. Step 6: Final answer
    x = 8,128.29

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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.