Home / 13,111.38-18,093.06-7,143.03

Finding the Fourth Proportional to 13,111.38, 18,093.06 and 7,143.03

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Solution

The fourth proportional to 13,111.38, 18,093.06 and 7,143.03 is: 9,857.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.38 : 18,093.06 = 7,143.03 : x
  2. Step 2: Convert to fraction form
    13,111.38/18,093.06 = 7,143.03/x
  3. Step 3: Cross multiply
    13,111.38x = 18,093.06 × 7,143.03
  4. Step 4: Simplify right side
    13,111.38x = 129,239,270.37
  5. Step 5: Solve for x
    x = 129,239,270.37/13,111.38
  6. Step 6: Final answer
    x = 9,857.03

Related Problems

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Half scale
Find fourth proportional to 26,222.76, 36,186.12 and 14,286.06
Double scale
Find fourth proportional to 13,112.38, 18,094.44 and 7,144.03
Similar ratio
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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.