Home / 11,821.80-17,732.70-7,442.40

Finding the Fourth Proportional to 11,821.80, 17,732.70 and 7,442.40

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Solution

The fourth proportional to 11,821.80, 17,732.70 and 7,442.40 is: 11,163.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.80 : 17,732.70 = 7,442.40 : x
  2. Step 2: Convert to fraction form
    11,821.80/17,732.70 = 7,442.40/x
  3. Step 3: Cross multiply
    11,821.80x = 17,732.70 × 7,442.40
  4. Step 4: Simplify right side
    11,821.80x = 131,973,846.48
  5. Step 5: Solve for x
    x = 131,973,846.48/11,821.80
  6. Step 6: Final answer
    x = 11,163.60

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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.