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Finding the Fourth Proportional to 3,989.40, 6,021.56 and 3,989.40

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Solution

The fourth proportional to 3,989.40, 6,021.56 and 3,989.40 is: 6,021.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.40 : 6,021.56 = 3,989.40 : x
  2. Step 2: Convert to fraction form
    3,989.40/6,021.56 = 3,989.40/x
  3. Step 3: Cross multiply
    3,989.40x = 6,021.56 × 3,989.40
  4. Step 4: Simplify right side
    3,989.40x = 24,022,411.46
  5. Step 5: Solve for x
    x = 24,022,411.46/3,989.40
  6. Step 6: Final answer
    x = 6,021.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.