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Finding the Fourth Proportional to 20,476.55, 30,704.57 and 9,939.99

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Solution

The fourth proportional to 20,476.55, 30,704.57 and 9,939.99 is: 14,905.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.55 : 30,704.57 = 9,939.99 : x
  2. Step 2: Convert to fraction form
    20,476.55/30,704.57 = 9,939.99/x
  3. Step 3: Cross multiply
    20,476.55x = 30,704.57 × 9,939.99
  4. Step 4: Simplify right side
    20,476.55x = 305,203,135.11
  5. Step 5: Solve for x
    x = 305,203,135.11/20,476.55
  6. Step 6: Final answer
    x = 14,905.01

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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.