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Finding the Fourth Proportional to 20,571.56, 30,859.89 and 7,241.40

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Solution

The fourth proportional to 20,571.56, 30,859.89 and 7,241.40 is: 10,863.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.56 : 30,859.89 = 7,241.40 : x
  2. Step 2: Convert to fraction form
    20,571.56/30,859.89 = 7,241.40/x
  3. Step 3: Cross multiply
    20,571.56x = 30,859.89 × 7,241.40
  4. Step 4: Simplify right side
    20,571.56x = 223,468,807.45
  5. Step 5: Solve for x
    x = 223,468,807.45/20,571.56
  6. Step 6: Final answer
    x = 10,863.00

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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.