Home / 13,180.98-18,189.48-7,212.45

Finding the Fourth Proportional to 13,180.98, 18,189.48 and 7,212.45

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Solution

The fourth proportional to 13,180.98, 18,189.48 and 7,212.45 is: 9,953.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.98 : 18,189.48 = 7,212.45 : x
  2. Step 2: Convert to fraction form
    13,180.98/18,189.48 = 7,212.45/x
  3. Step 3: Cross multiply
    13,180.98x = 18,189.48 × 7,212.45
  4. Step 4: Simplify right side
    13,180.98x = 131,190,715.03
  5. Step 5: Solve for x
    x = 131,190,715.03/13,180.98
  6. Step 6: Final answer
    x = 9,953.03

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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.