Home / 3,111.40-4,288.98-2,693.80

Finding the Fourth Proportional to 3,111.40, 4,288.98 and 2,693.80

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Solution

The fourth proportional to 3,111.40, 4,288.98 and 2,693.80 is: 3,713.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.40 : 4,288.98 = 2,693.80 : x
  2. Step 2: Convert to fraction form
    3,111.40/4,288.98 = 2,693.80/x
  3. Step 3: Cross multiply
    3,111.40x = 4,288.98 × 2,693.80
  4. Step 4: Simplify right side
    3,111.40x = 11,553,654.32
  5. Step 5: Solve for x
    x = 11,553,654.32/3,111.40
  6. Step 6: Final answer
    x = 3,713.33

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1.5x scale

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.