Home / 13,179.96-18,188.58-7,212.15

Finding the Fourth Proportional to 13,179.96, 18,188.58 and 7,212.15

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Solution

The fourth proportional to 13,179.96, 18,188.58 and 7,212.15 is: 9,952.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.96 : 18,188.58 = 7,212.15 : x
  2. Step 2: Convert to fraction form
    13,179.96/18,188.58 = 7,212.15/x
  3. Step 3: Cross multiply
    13,179.96x = 18,188.58 × 7,212.15
  4. Step 4: Simplify right side
    13,179.96x = 131,178,731.19
  5. Step 5: Solve for x
    x = 131,178,731.19/13,179.96
  6. Step 6: Final answer
    x = 9,952.89

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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.