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Finding the Fourth Proportional to 11,928.20, 16,460.90 and 6,960.20

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Solution

The fourth proportional to 11,928.20, 16,460.90 and 6,960.20 is: 9,605.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,928.20 : 16,460.90 = 6,960.20 : x
  2. Step 2: Convert to fraction form
    11,928.20/16,460.90 = 6,960.20/x
  3. Step 3: Cross multiply
    11,928.20x = 16,460.90 × 6,960.20
  4. Step 4: Simplify right side
    11,928.20x = 114,571,039.07
  5. Step 5: Solve for x
    x = 114,571,039.07/11,928.20
  6. Step 6: Final answer
    x = 9,605.06

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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.