Home / 3,688.74-5,090.58-2,116.80

Finding the Fourth Proportional to 3,688.74, 5,090.58 and 2,116.80

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Solution

The fourth proportional to 3,688.74, 5,090.58 and 2,116.80 is: 2,921.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.74 : 5,090.58 = 2,116.80 : x
  2. Step 2: Convert to fraction form
    3,688.74/5,090.58 = 2,116.80/x
  3. Step 3: Cross multiply
    3,688.74x = 5,090.58 × 2,116.80
  4. Step 4: Simplify right side
    3,688.74x = 10,775,739.74
  5. Step 5: Solve for x
    x = 10,775,739.74/3,688.74
  6. Step 6: Final answer
    x = 2,921.25

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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.