Home / 3,111.76-4,294.68-1,786

Finding the Fourth Proportional to 3,111.76, 4,294.68 and 1,786

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Solution

The fourth proportional to 3,111.76, 4,294.68 and 1,786 is: 2,464.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.76 : 4,294.68 = 1,786 : x
  2. Step 2: Convert to fraction form
    3,111.76/4,294.68 = 1,786/x
  3. Step 3: Cross multiply
    3,111.76x = 4,294.68 × 1,786
  4. Step 4: Simplify right side
    3,111.76x = 7,670,298.48
  5. Step 5: Solve for x
    x = 7,670,298.48/3,111.76
  6. Step 6: Final answer
    x = 2,464.94

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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.