Home / 13,179.89-18,188.75-7,212.08

Finding the Fourth Proportional to 13,179.89, 18,188.75 and 7,212.08

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Solution

The fourth proportional to 13,179.89, 18,188.75 and 7,212.08 is: 9,952.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.89 : 18,188.75 = 7,212.08 : x
  2. Step 2: Convert to fraction form
    13,179.89/18,188.75 = 7,212.08/x
  3. Step 3: Cross multiply
    13,179.89x = 18,188.75 × 7,212.08
  4. Step 4: Simplify right side
    13,179.89x = 131,178,720.10
  5. Step 5: Solve for x
    x = 131,178,720.10/13,179.89
  6. Step 6: Final answer
    x = 9,952.94

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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.