Home / 2,961.40-4,084.68-1,913.80

Finding the Fourth Proportional to 2,961.40, 4,084.68 and 1,913.80

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Solution

The fourth proportional to 2,961.40, 4,084.68 and 1,913.80 is: 2,639.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.40 : 4,084.68 = 1,913.80 : x
  2. Step 2: Convert to fraction form
    2,961.40/4,084.68 = 1,913.80/x
  3. Step 3: Cross multiply
    2,961.40x = 4,084.68 × 1,913.80
  4. Step 4: Simplify right side
    2,961.40x = 7,817,260.58
  5. Step 5: Solve for x
    x = 7,817,260.58/2,961.40
  6. Step 6: Final answer
    x = 2,639.72

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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.