Home / 3,178.31-4,386.07-1,936.31

Finding the Fourth Proportional to 3,178.31, 4,386.07 and 1,936.31

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Solution

The fourth proportional to 3,178.31, 4,386.07 and 1,936.31 is: 2,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.31 : 4,386.07 = 1,936.31 : x
  2. Step 2: Convert to fraction form
    3,178.31/4,386.07 = 1,936.31/x
  3. Step 3: Cross multiply
    3,178.31x = 4,386.07 × 1,936.31
  4. Step 4: Simplify right side
    3,178.31x = 8,492,804.59
  5. Step 5: Solve for x
    x = 8,492,804.59/3,178.31
  6. Step 6: Final answer
    x = 2,672.11

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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.