Home / 13,180.36-18,188.70-7,212.28

Finding the Fourth Proportional to 13,180.36, 18,188.70 and 7,212.28

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Solution

The fourth proportional to 13,180.36, 18,188.70 and 7,212.28 is: 9,952.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.36 : 18,188.70 = 7,212.28 : x
  2. Step 2: Convert to fraction form
    13,180.36/18,188.70 = 7,212.28/x
  3. Step 3: Cross multiply
    13,180.36x = 18,188.70 × 7,212.28
  4. Step 4: Simplify right side
    13,180.36x = 131,181,997.24
  5. Step 5: Solve for x
    x = 131,181,997.24/13,180.36
  6. Step 6: Final answer
    x = 9,952.84

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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.