Home / 12,311.36-16,989.44-6,722.40

Finding the Fourth Proportional to 12,311.36, 16,989.44 and 6,722.40

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Solution

The fourth proportional to 12,311.36, 16,989.44 and 6,722.40 is: 9,276.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,311.36 : 16,989.44 = 6,722.40 : x
  2. Step 2: Convert to fraction form
    12,311.36/16,989.44 = 6,722.40/x
  3. Step 3: Cross multiply
    12,311.36x = 16,989.44 × 6,722.40
  4. Step 4: Simplify right side
    12,311.36x = 114,209,811.46
  5. Step 5: Solve for x
    x = 114,209,811.46/12,311.36
  6. Step 6: Final answer
    x = 9,276.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.