Home / 11,997.18-17,995.95-5,418.78

Finding the Fourth Proportional to 11,997.18, 17,995.95 and 5,418.78

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Solution

The fourth proportional to 11,997.18, 17,995.95 and 5,418.78 is: 8,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,997.18 : 17,995.95 = 5,418.78 : x
  2. Step 2: Convert to fraction form
    11,997.18/17,995.95 = 5,418.78/x
  3. Step 3: Cross multiply
    11,997.18x = 17,995.95 × 5,418.78
  4. Step 4: Simplify right side
    11,997.18x = 97,516,093.94
  5. Step 5: Solve for x
    x = 97,516,093.94/11,997.18
  6. Step 6: Final answer
    x = 8,128.25

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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.