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Finding the Fourth Proportional to 20,391.84, 30,561.84 and 9,304.56

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Solution

The fourth proportional to 20,391.84, 30,561.84 and 9,304.56 is: 13,945.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.84 : 30,561.84 = 9,304.56 : x
  2. Step 2: Convert to fraction form
    20,391.84/30,561.84 = 9,304.56/x
  3. Step 3: Cross multiply
    20,391.84x = 30,561.84 × 9,304.56
  4. Step 4: Simplify right side
    20,391.84x = 284,364,473.99
  5. Step 5: Solve for x
    x = 284,364,473.99/20,391.84
  6. Step 6: Final answer
    x = 13,945.01

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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.