Home / 2,686.20-3,702.42-1,889.76

Finding the Fourth Proportional to 2,686.20, 3,702.42 and 1,889.76

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Solution

The fourth proportional to 2,686.20, 3,702.42 and 1,889.76 is: 2,604.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.20 : 3,702.42 = 1,889.76 : x
  2. Step 2: Convert to fraction form
    2,686.20/3,702.42 = 1,889.76/x
  3. Step 3: Cross multiply
    2,686.20x = 3,702.42 × 1,889.76
  4. Step 4: Simplify right side
    2,686.20x = 6,996,685.22
  5. Step 5: Solve for x
    x = 6,996,685.22/2,686.20
  6. Step 6: Final answer
    x = 2,604.68

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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.