Home / 11,997.12-17,989.44-5,420.16

Finding the Fourth Proportional to 11,997.12, 17,989.44 and 5,420.16

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Solution

The fourth proportional to 11,997.12, 17,989.44 and 5,420.16 is: 8,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,997.12 : 17,989.44 = 5,420.16 : x
  2. Step 2: Convert to fraction form
    11,997.12/17,989.44 = 5,420.16/x
  3. Step 3: Cross multiply
    11,997.12x = 17,989.44 × 5,420.16
  4. Step 4: Simplify right side
    11,997.12x = 97,505,643.11
  5. Step 5: Solve for x
    x = 97,505,643.11/11,997.12
  6. Step 6: Final answer
    x = 8,127.42

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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.