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Finding the Fourth Proportional to 30,644.67, 45,939.26 and 21,289.07

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Solution

The fourth proportional to 30,644.67, 45,939.26 and 21,289.07 is: 31,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,644.67 : 45,939.26 = 21,289.07 : x
  2. Step 2: Convert to fraction form
    30,644.67/45,939.26 = 21,289.07/x
  3. Step 3: Cross multiply
    30,644.67x = 45,939.26 × 21,289.07
  4. Step 4: Simplify right side
    30,644.67x = 978,004,289.96
  5. Step 5: Solve for x
    x = 978,004,289.96/30,644.67
  6. Step 6: Final answer
    x = 31,914.34

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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.