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Finding the Fourth Proportional to 20,548.35, 30,822.53 and 7,040.54

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Solution

The fourth proportional to 20,548.35, 30,822.53 and 7,040.54 is: 10,560.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,548.35 : 30,822.53 = 7,040.54 : x
  2. Step 2: Convert to fraction form
    20,548.35/30,822.53 = 7,040.54/x
  3. Step 3: Cross multiply
    20,548.35x = 30,822.53 × 7,040.54
  4. Step 4: Simplify right side
    20,548.35x = 217,007,297.22
  5. Step 5: Solve for x
    x = 217,007,297.22/20,548.35
  6. Step 6: Final answer
    x = 10,560.81

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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.