Home / 2,815.67-3,889.32-2,160.62

Finding the Fourth Proportional to 2,815.67, 3,889.32 and 2,160.62

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Solution

The fourth proportional to 2,815.67, 3,889.32 and 2,160.62 is: 2,984.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.67 : 3,889.32 = 2,160.62 : x
  2. Step 2: Convert to fraction form
    2,815.67/3,889.32 = 2,160.62/x
  3. Step 3: Cross multiply
    2,815.67x = 3,889.32 × 2,160.62
  4. Step 4: Simplify right side
    2,815.67x = 8,403,323.13
  5. Step 5: Solve for x
    x = 8,403,323.13/2,815.67
  6. Step 6: Final answer
    x = 2,984.48

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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.