Home / 3,688.75-5,090.68-2,116.95

Finding the Fourth Proportional to 3,688.75, 5,090.68 and 2,116.95

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Solution

The fourth proportional to 3,688.75, 5,090.68 and 2,116.95 is: 2,921.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.75 : 5,090.68 = 2,116.95 : x
  2. Step 2: Convert to fraction form
    3,688.75/5,090.68 = 2,116.95/x
  3. Step 3: Cross multiply
    3,688.75x = 5,090.68 × 2,116.95
  4. Step 4: Simplify right side
    3,688.75x = 10,776,715.03
  5. Step 5: Solve for x
    x = 10,776,715.03/3,688.75
  6. Step 6: Final answer
    x = 2,921.51

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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.