Home / 7,021.71-9,689.91-3,877.89

Finding the Fourth Proportional to 7,021.71, 9,689.91 and 3,877.89

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Solution

The fourth proportional to 7,021.71, 9,689.91 and 3,877.89 is: 5,351.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.71 : 9,689.91 = 3,877.89 : x
  2. Step 2: Convert to fraction form
    7,021.71/9,689.91 = 3,877.89/x
  3. Step 3: Cross multiply
    7,021.71x = 9,689.91 × 3,877.89
  4. Step 4: Simplify right side
    7,021.71x = 37,576,405.09
  5. Step 5: Solve for x
    x = 37,576,405.09/7,021.71
  6. Step 6: Final answer
    x = 5,351.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.