Home / 5,111.65-7,665.45-1,991.23

Finding the Fourth Proportional to 5,111.65, 7,665.45 and 1,991.23

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Solution

The fourth proportional to 5,111.65, 7,665.45 and 1,991.23 is: 2,986.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,111.65 : 7,665.45 = 1,991.23 : x
  2. Step 2: Convert to fraction form
    5,111.65/7,665.45 = 1,991.23/x
  3. Step 3: Cross multiply
    5,111.65x = 7,665.45 × 1,991.23
  4. Step 4: Simplify right side
    5,111.65x = 15,263,674.00
  5. Step 5: Solve for x
    x = 15,263,674.00/5,111.65
  6. Step 6: Final answer
    x = 2,986.06

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1.5x scale

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.