Home / 13,178.89-18,187.37-7,211.08

Finding the Fourth Proportional to 13,178.89, 18,187.37 and 7,211.08

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Solution

The fourth proportional to 13,178.89, 18,187.37 and 7,211.08 is: 9,951.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.89 : 18,187.37 = 7,211.08 : x
  2. Step 2: Convert to fraction form
    13,178.89/18,187.37 = 7,211.08/x
  3. Step 3: Cross multiply
    13,178.89x = 18,187.37 × 7,211.08
  4. Step 4: Simplify right side
    13,178.89x = 131,150,580.06
  5. Step 5: Solve for x
    x = 131,150,580.06/13,178.89
  6. Step 6: Final answer
    x = 9,951.56

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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.