Home / 13,335.90-19,986.54-5,429.22

Finding the Fourth Proportional to 13,335.90, 19,986.54 and 5,429.22

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Solution

The fourth proportional to 13,335.90, 19,986.54 and 5,429.22 is: 8,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,335.90 : 19,986.54 = 5,429.22 : x
  2. Step 2: Convert to fraction form
    13,335.90/19,986.54 = 5,429.22/x
  3. Step 3: Cross multiply
    13,335.90x = 19,986.54 × 5,429.22
  4. Step 4: Simplify right side
    13,335.90x = 108,511,322.70
  5. Step 5: Solve for x
    x = 108,511,322.70/13,335.90
  6. Step 6: Final answer
    x = 8,136.78

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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.