Home / 3,111.48-4,666-1,939.80

Finding the Fourth Proportional to 3,111.48, 4,666 and 1,939.80

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Solution

The fourth proportional to 3,111.48, 4,666 and 1,939.80 is: 2,908.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.48 : 4,666 = 1,939.80 : x
  2. Step 2: Convert to fraction form
    3,111.48/4,666 = 1,939.80/x
  3. Step 3: Cross multiply
    3,111.48x = 4,666 × 1,939.80
  4. Step 4: Simplify right side
    3,111.48x = 9,051,106.80
  5. Step 5: Solve for x
    x = 9,051,106.80/3,111.48
  6. Step 6: Final answer
    x = 2,908.94

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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.