Home / 3,128.87-4,688.66-2,681.75

Finding the Fourth Proportional to 3,128.87, 4,688.66 and 2,681.75

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Solution

The fourth proportional to 3,128.87, 4,688.66 and 2,681.75 is: 4,018.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.87 : 4,688.66 = 2,681.75 : x
  2. Step 2: Convert to fraction form
    3,128.87/4,688.66 = 2,681.75/x
  3. Step 3: Cross multiply
    3,128.87x = 4,688.66 × 2,681.75
  4. Step 4: Simplify right side
    3,128.87x = 12,573,813.96
  5. Step 5: Solve for x
    x = 12,573,813.96/3,128.87
  6. Step 6: Final answer
    x = 4,018.64

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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.