Home / 3,989.66-5,506.95-2,730.21

Finding the Fourth Proportional to 3,989.66, 5,506.95 and 2,730.21

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Solution

The fourth proportional to 3,989.66, 5,506.95 and 2,730.21 is: 3,768.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.66 : 5,506.95 = 2,730.21 : x
  2. Step 2: Convert to fraction form
    3,989.66/5,506.95 = 2,730.21/x
  3. Step 3: Cross multiply
    3,989.66x = 5,506.95 × 2,730.21
  4. Step 4: Simplify right side
    3,989.66x = 15,035,119.55
  5. Step 5: Solve for x
    x = 15,035,119.55/3,989.66
  6. Step 6: Final answer
    x = 3,768.53

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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.