Home / 13,989.58-20,982.57-4,129.90

Finding the Fourth Proportional to 13,989.58, 20,982.57 and 4,129.90

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Solution

The fourth proportional to 13,989.58, 20,982.57 and 4,129.90 is: 6,194.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.58 : 20,982.57 = 4,129.90 : x
  2. Step 2: Convert to fraction form
    13,989.58/20,982.57 = 4,129.90/x
  3. Step 3: Cross multiply
    13,989.58x = 20,982.57 × 4,129.90
  4. Step 4: Simplify right side
    13,989.58x = 86,655,915.84
  5. Step 5: Solve for x
    x = 86,655,915.84/13,989.58
  6. Step 6: Final answer
    x = 6,194.32

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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.