Home / 13,280.29-19,921.65-3,419.60

Finding the Fourth Proportional to 13,280.29, 19,921.65 and 3,419.60

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Solution

The fourth proportional to 13,280.29, 19,921.65 and 3,419.60 is: 5,129.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.29 : 19,921.65 = 3,419.60 : x
  2. Step 2: Convert to fraction form
    13,280.29/19,921.65 = 3,419.60/x
  3. Step 3: Cross multiply
    13,280.29x = 19,921.65 × 3,419.60
  4. Step 4: Simplify right side
    13,280.29x = 68,124,074.34
  5. Step 5: Solve for x
    x = 68,124,074.34/13,280.29
  6. Step 6: Final answer
    x = 5,129.71

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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.