Home / 13,281.29-19,923.15-3,420.60

Finding the Fourth Proportional to 13,281.29, 19,923.15 and 3,420.60

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Solution

The fourth proportional to 13,281.29, 19,923.15 and 3,420.60 is: 5,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.29 : 19,923.15 = 3,420.60 : x
  2. Step 2: Convert to fraction form
    13,281.29/19,923.15 = 3,420.60/x
  3. Step 3: Cross multiply
    13,281.29x = 19,923.15 × 3,420.60
  4. Step 4: Simplify right side
    13,281.29x = 68,149,126.89
  5. Step 5: Solve for x
    x = 68,149,126.89/13,281.29
  6. Step 6: Final answer
    x = 5,131.21

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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.