Home / 2,826.18-3,897.35-2,155.70

Finding the Fourth Proportional to 2,826.18, 3,897.35 and 2,155.70

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Solution

The fourth proportional to 2,826.18, 3,897.35 and 2,155.70 is: 2,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826.18 : 3,897.35 = 2,155.70 : x
  2. Step 2: Convert to fraction form
    2,826.18/3,897.35 = 2,155.70/x
  3. Step 3: Cross multiply
    2,826.18x = 3,897.35 × 2,155.70
  4. Step 4: Simplify right side
    2,826.18x = 8,401,517.40
  5. Step 5: Solve for x
    x = 8,401,517.40/2,826.18
  6. Step 6: Final answer
    x = 2,972.75

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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.