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Finding the Fourth Proportional to 20,195.56, 30,259.74 and 7,040.68

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Solution

The fourth proportional to 20,195.56, 30,259.74 and 7,040.68 is: 10,549.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,195.56 : 30,259.74 = 7,040.68 : x
  2. Step 2: Convert to fraction form
    20,195.56/30,259.74 = 7,040.68/x
  3. Step 3: Cross multiply
    20,195.56x = 30,259.74 × 7,040.68
  4. Step 4: Simplify right side
    20,195.56x = 213,049,146.22
  5. Step 5: Solve for x
    x = 213,049,146.22/20,195.56
  6. Step 6: Final answer
    x = 10,549.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.