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Finding the Fourth Proportional to 13,989.94, 20,984.91 and 4,755.94

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Solution

The fourth proportional to 13,989.94, 20,984.91 and 4,755.94 is: 7,133.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.94 : 20,984.91 = 4,755.94 : x
  2. Step 2: Convert to fraction form
    13,989.94/20,984.91 = 4,755.94/x
  3. Step 3: Cross multiply
    13,989.94x = 20,984.91 × 4,755.94
  4. Step 4: Simplify right side
    13,989.94x = 99,802,902.57
  5. Step 5: Solve for x
    x = 99,802,902.57/13,989.94
  6. Step 6: Final answer
    x = 7,133.91

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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.