Home / 13,989.12-20,976.64-6,188.80

Finding the Fourth Proportional to 13,989.12, 20,976.64 and 6,188.80

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Solution

The fourth proportional to 13,989.12, 20,976.64 and 6,188.80 is: 9,280.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.12 : 20,976.64 = 6,188.80 : x
  2. Step 2: Convert to fraction form
    13,989.12/20,976.64 = 6,188.80/x
  3. Step 3: Cross multiply
    13,989.12x = 20,976.64 × 6,188.80
  4. Step 4: Simplify right side
    13,989.12x = 129,820,229.63
  5. Step 5: Solve for x
    x = 129,820,229.63/13,989.12
  6. Step 6: Final answer
    x = 9,280.09

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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.