Home / 11,219.40-16,829.90-3,428.20

Finding the Fourth Proportional to 11,219.40, 16,829.90 and 3,428.20

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Solution

The fourth proportional to 11,219.40, 16,829.90 and 3,428.20 is: 5,142.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,219.40 : 16,829.90 = 3,428.20 : x
  2. Step 2: Convert to fraction form
    11,219.40/16,829.90 = 3,428.20/x
  3. Step 3: Cross multiply
    11,219.40x = 16,829.90 × 3,428.20
  4. Step 4: Simplify right side
    11,219.40x = 57,696,263.18
  5. Step 5: Solve for x
    x = 57,696,263.18/11,219.40
  6. Step 6: Final answer
    x = 5,142.54

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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.