Home / 2,688.60-4,025.20-1,821.36

Finding the Fourth Proportional to 2,688.60, 4,025.20 and 1,821.36

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Solution

The fourth proportional to 2,688.60, 4,025.20 and 1,821.36 is: 2,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.60 : 4,025.20 = 1,821.36 : x
  2. Step 2: Convert to fraction form
    2,688.60/4,025.20 = 1,821.36/x
  3. Step 3: Cross multiply
    2,688.60x = 4,025.20 × 1,821.36
  4. Step 4: Simplify right side
    2,688.60x = 7,331,338.27
  5. Step 5: Solve for x
    x = 7,331,338.27/2,688.60
  6. Step 6: Final answer
    x = 2,726.82

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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.