Home / 3,127.09-4,315.41-1,800.79

Finding the Fourth Proportional to 3,127.09, 4,315.41 and 1,800.79

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Solution

The fourth proportional to 3,127.09, 4,315.41 and 1,800.79 is: 2,485.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.09 : 4,315.41 = 1,800.79 : x
  2. Step 2: Convert to fraction form
    3,127.09/4,315.41 = 1,800.79/x
  3. Step 3: Cross multiply
    3,127.09x = 4,315.41 × 1,800.79
  4. Step 4: Simplify right side
    3,127.09x = 7,771,147.17
  5. Step 5: Solve for x
    x = 7,771,147.17/3,127.09
  6. Step 6: Final answer
    x = 2,485.11

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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.