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Finding the Fourth Proportional to 12,020.68, 18,040.32 and 7,859.56

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Solution

The fourth proportional to 12,020.68, 18,040.32 and 7,859.56 is: 11,795.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,020.68 : 18,040.32 = 7,859.56 : x
  2. Step 2: Convert to fraction form
    12,020.68/18,040.32 = 7,859.56/x
  3. Step 3: Cross multiply
    12,020.68x = 18,040.32 × 7,859.56
  4. Step 4: Simplify right side
    12,020.68x = 141,788,977.46
  5. Step 5: Solve for x
    x = 141,788,977.46/12,020.68
  6. Step 6: Final answer
    x = 11,795.42

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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.