Home / 3,689.63-5,090.60-2,196.80

Finding the Fourth Proportional to 3,689.63, 5,090.60 and 2,196.80

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Solution

The fourth proportional to 3,689.63, 5,090.60 and 2,196.80 is: 3,030.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,689.63 : 5,090.60 = 2,196.80 : x
  2. Step 2: Convert to fraction form
    3,689.63/5,090.60 = 2,196.80/x
  3. Step 3: Cross multiply
    3,689.63x = 5,090.60 × 2,196.80
  4. Step 4: Simplify right side
    3,689.63x = 11,183,030.08
  5. Step 5: Solve for x
    x = 11,183,030.08/3,689.63
  6. Step 6: Final answer
    x = 3,030.94

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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.