Home / 2,639.80-3,955.74-2,117.08

Finding the Fourth Proportional to 2,639.80, 3,955.74 and 2,117.08

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Solution

The fourth proportional to 2,639.80, 3,955.74 and 2,117.08 is: 3,172.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.80 : 3,955.74 = 2,117.08 : x
  2. Step 2: Convert to fraction form
    2,639.80/3,955.74 = 2,117.08/x
  3. Step 3: Cross multiply
    2,639.80x = 3,955.74 × 2,117.08
  4. Step 4: Simplify right side
    2,639.80x = 8,374,618.04
  5. Step 5: Solve for x
    x = 8,374,618.04/2,639.80
  6. Step 6: Final answer
    x = 3,172.44

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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.