Home / 7,678.85-11,518.28-2,132.21

Finding the Fourth Proportional to 7,678.85, 11,518.28 and 2,132.21

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Solution

The fourth proportional to 7,678.85, 11,518.28 and 2,132.21 is: 3,198.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.85 : 11,518.28 = 2,132.21 : x
  2. Step 2: Convert to fraction form
    7,678.85/11,518.28 = 2,132.21/x
  3. Step 3: Cross multiply
    7,678.85x = 11,518.28 × 2,132.21
  4. Step 4: Simplify right side
    7,678.85x = 24,559,339.54
  5. Step 5: Solve for x
    x = 24,559,339.54/7,678.85
  6. Step 6: Final answer
    x = 3,198.31

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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.