Home / 7,938.94-11,911.77-3,988.11

Finding the Fourth Proportional to 7,938.94, 11,911.77 and 3,988.11

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Solution

The fourth proportional to 7,938.94, 11,911.77 and 3,988.11 is: 5,983.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938.94 : 11,911.77 = 3,988.11 : x
  2. Step 2: Convert to fraction form
    7,938.94/11,911.77 = 3,988.11/x
  3. Step 3: Cross multiply
    7,938.94x = 11,911.77 × 3,988.11
  4. Step 4: Simplify right side
    7,938.94x = 47,505,501.94
  5. Step 5: Solve for x
    x = 47,505,501.94/7,938.94
  6. Step 6: Final answer
    x = 5,983.86

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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.