Home / 13,989.75-20,988.46-4,129.02

Finding the Fourth Proportional to 13,989.75, 20,988.46 and 4,129.02

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Solution

The fourth proportional to 13,989.75, 20,988.46 and 4,129.02 is: 6,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.75 : 20,988.46 = 4,129.02 : x
  2. Step 2: Convert to fraction form
    13,989.75/20,988.46 = 4,129.02/x
  3. Step 3: Cross multiply
    13,989.75x = 20,988.46 × 4,129.02
  4. Step 4: Simplify right side
    13,989.75x = 86,661,771.11
  5. Step 5: Solve for x
    x = 86,661,771.11/13,989.75
  6. Step 6: Final answer
    x = 6,194.66

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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.