Home / 3,969.95-5,478.57-2,201.58

Finding the Fourth Proportional to 3,969.95, 5,478.57 and 2,201.58

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Solution

The fourth proportional to 3,969.95, 5,478.57 and 2,201.58 is: 3,038.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.95 : 5,478.57 = 2,201.58 : x
  2. Step 2: Convert to fraction form
    3,969.95/5,478.57 = 2,201.58/x
  3. Step 3: Cross multiply
    3,969.95x = 5,478.57 × 2,201.58
  4. Step 4: Simplify right side
    3,969.95x = 12,061,510.14
  5. Step 5: Solve for x
    x = 12,061,510.14/3,969.95
  6. Step 6: Final answer
    x = 3,038.21

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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.