Home / 7,428.40-11,145.60-3,269.20

Finding the Fourth Proportional to 7,428.40, 11,145.60 and 3,269.20

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Solution

The fourth proportional to 7,428.40, 11,145.60 and 3,269.20 is: 4,905.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.40 : 11,145.60 = 3,269.20 : x
  2. Step 2: Convert to fraction form
    7,428.40/11,145.60 = 3,269.20/x
  3. Step 3: Cross multiply
    7,428.40x = 11,145.60 × 3,269.20
  4. Step 4: Simplify right side
    7,428.40x = 36,437,195.52
  5. Step 5: Solve for x
    x = 36,437,195.52/7,428.40
  6. Step 6: Final answer
    x = 4,905.12

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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.