Home / 13,989.21-20,983.15-3,459.20

Finding the Fourth Proportional to 13,989.21, 20,983.15 and 3,459.20

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Solution

The fourth proportional to 13,989.21, 20,983.15 and 3,459.20 is: 5,188.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.21 : 20,983.15 = 3,459.20 : x
  2. Step 2: Convert to fraction form
    13,989.21/20,983.15 = 3,459.20/x
  3. Step 3: Cross multiply
    13,989.21x = 20,983.15 × 3,459.20
  4. Step 4: Simplify right side
    13,989.21x = 72,584,811.89
  5. Step 5: Solve for x
    x = 72,584,811.89/13,989.21
  6. Step 6: Final answer
    x = 5,188.63

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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.