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Finding the Fourth Proportional to 20,639.98, 30,932.02 and 9,381.34

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Solution

The fourth proportional to 20,639.98, 30,932.02 and 9,381.34 is: 14,059.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.98 : 30,932.02 = 9,381.34 : x
  2. Step 2: Convert to fraction form
    20,639.98/30,932.02 = 9,381.34/x
  3. Step 3: Cross multiply
    20,639.98x = 30,932.02 × 9,381.34
  4. Step 4: Simplify right side
    20,639.98x = 290,183,796.51
  5. Step 5: Solve for x
    x = 290,183,796.51/20,639.98
  6. Step 6: Final answer
    x = 14,059.31

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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.