Home / 13,146.82-18,142.67-7,178.63

Finding the Fourth Proportional to 13,146.82, 18,142.67 and 7,178.63

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Solution

The fourth proportional to 13,146.82, 18,142.67 and 7,178.63 is: 9,906.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.82 : 18,142.67 = 7,178.63 : x
  2. Step 2: Convert to fraction form
    13,146.82/18,142.67 = 7,178.63/x
  3. Step 3: Cross multiply
    13,146.82x = 18,142.67 × 7,178.63
  4. Step 4: Simplify right side
    13,146.82x = 130,239,515.14
  5. Step 5: Solve for x
    x = 130,239,515.14/13,146.82
  6. Step 6: Final answer
    x = 9,906.54

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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.