Home / 13,126.56-18,112.44-7,821.24

Finding the Fourth Proportional to 13,126.56, 18,112.44 and 7,821.24

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Solution

The fourth proportional to 13,126.56, 18,112.44 and 7,821.24 is: 10,791.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.56 : 18,112.44 = 7,821.24 : x
  2. Step 2: Convert to fraction form
    13,126.56/18,112.44 = 7,821.24/x
  3. Step 3: Cross multiply
    13,126.56x = 18,112.44 × 7,821.24
  4. Step 4: Simplify right side
    13,126.56x = 141,661,740.23
  5. Step 5: Solve for x
    x = 141,661,740.23/13,126.56
  6. Step 6: Final answer
    x = 10,791.99

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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.