Home / 7,121.67-10,682.55-2,191.40

Finding the Fourth Proportional to 7,121.67, 10,682.55 and 2,191.40

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Solution

The fourth proportional to 7,121.67, 10,682.55 and 2,191.40 is: 3,287.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.67 : 10,682.55 = 2,191.40 : x
  2. Step 2: Convert to fraction form
    7,121.67/10,682.55 = 2,191.40/x
  3. Step 3: Cross multiply
    7,121.67x = 10,682.55 × 2,191.40
  4. Step 4: Simplify right side
    7,121.67x = 23,409,686.66
  5. Step 5: Solve for x
    x = 23,409,686.66/7,121.67
  6. Step 6: Final answer
    x = 3,287.11

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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.