Home / 13,280.84-19,921.23-3,420.11

Finding the Fourth Proportional to 13,280.84, 19,921.23 and 3,420.11

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Solution

The fourth proportional to 13,280.84, 19,921.23 and 3,420.11 is: 5,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.84 : 19,921.23 = 3,420.11 : x
  2. Step 2: Convert to fraction form
    13,280.84/19,921.23 = 3,420.11/x
  3. Step 3: Cross multiply
    13,280.84x = 19,921.23 × 3,420.11
  4. Step 4: Simplify right side
    13,280.84x = 68,132,698.33
  5. Step 5: Solve for x
    x = 68,132,698.33/13,280.84
  6. Step 6: Final answer
    x = 5,130.15

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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.