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Finding the Fourth Proportional to 47,286.80, 70,913.40 and 20,944.40

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Solution

The fourth proportional to 47,286.80, 70,913.40 and 20,944.40 is: 31,409.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,286.80 : 70,913.40 = 20,944.40 : x
  2. Step 2: Convert to fraction form
    47,286.80/70,913.40 = 20,944.40/x
  3. Step 3: Cross multiply
    47,286.80x = 70,913.40 × 20,944.40
  4. Step 4: Simplify right side
    47,286.80x = 1,485,238,614.96
  5. Step 5: Solve for x
    x = 1,485,238,614.96/47,286.80
  6. Step 6: Final answer
    x = 31,409.16

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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.