Home / 11,820.97-16,313.67-6,515.78

Finding the Fourth Proportional to 11,820.97, 16,313.67 and 6,515.78

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Solution

The fourth proportional to 11,820.97, 16,313.67 and 6,515.78 is: 8,992.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.97 : 16,313.67 = 6,515.78 : x
  2. Step 2: Convert to fraction form
    11,820.97/16,313.67 = 6,515.78/x
  3. Step 3: Cross multiply
    11,820.97x = 16,313.67 × 6,515.78
  4. Step 4: Simplify right side
    11,820.97x = 106,296,203.14
  5. Step 5: Solve for x
    x = 106,296,203.14/11,820.97
  6. Step 6: Final answer
    x = 8,992.17

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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.