Home / 6,639.36-9,960-2,021.76

Finding the Fourth Proportional to 6,639.36, 9,960 and 2,021.76

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Solution

The fourth proportional to 6,639.36, 9,960 and 2,021.76 is: 3,032.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.36 : 9,960 = 2,021.76 : x
  2. Step 2: Convert to fraction form
    6,639.36/9,960 = 2,021.76/x
  3. Step 3: Cross multiply
    6,639.36x = 9,960 × 2,021.76
  4. Step 4: Simplify right side
    6,639.36x = 20,136,729.60
  5. Step 5: Solve for x
    x = 20,136,729.60/6,639.36
  6. Step 6: Final answer
    x = 3,032.93

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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.