Home / 3,989.34-5,981.73-1,215.23

Finding the Fourth Proportional to 3,989.34, 5,981.73 and 1,215.23

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Solution

The fourth proportional to 3,989.34, 5,981.73 and 1,215.23 is: 1,822.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.34 : 5,981.73 = 1,215.23 : x
  2. Step 2: Convert to fraction form
    3,989.34/5,981.73 = 1,215.23/x
  3. Step 3: Cross multiply
    3,989.34x = 5,981.73 × 1,215.23
  4. Step 4: Simplify right side
    3,989.34x = 7,269,147.84
  5. Step 5: Solve for x
    x = 7,269,147.84/3,989.34
  6. Step 6: Final answer
    x = 1,822.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.