Home / 3,128.49-4,318.65-2,185.65

Finding the Fourth Proportional to 3,128.49, 4,318.65 and 2,185.65

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Solution

The fourth proportional to 3,128.49, 4,318.65 and 2,185.65 is: 3,017.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.49 : 4,318.65 = 2,185.65 : x
  2. Step 2: Convert to fraction form
    3,128.49/4,318.65 = 2,185.65/x
  3. Step 3: Cross multiply
    3,128.49x = 4,318.65 × 2,185.65
  4. Step 4: Simplify right side
    3,128.49x = 9,439,057.37
  5. Step 5: Solve for x
    x = 9,439,057.37/3,128.49
  6. Step 6: Final answer
    x = 3,017.13

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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.