Home / 13,749.36-18,975.96-8,160.72

Finding the Fourth Proportional to 13,749.36, 18,975.96 and 8,160.72

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Solution

The fourth proportional to 13,749.36, 18,975.96 and 8,160.72 is: 11,262.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.36 : 18,975.96 = 8,160.72 : x
  2. Step 2: Convert to fraction form
    13,749.36/18,975.96 = 8,160.72/x
  3. Step 3: Cross multiply
    13,749.36x = 18,975.96 × 8,160.72
  4. Step 4: Simplify right side
    13,749.36x = 154,857,496.29
  5. Step 5: Solve for x
    x = 154,857,496.29/13,749.36
  6. Step 6: Final answer
    x = 11,262.89

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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.