Home / 7,418.81-11,128.23-2,154.12

Finding the Fourth Proportional to 7,418.81, 11,128.23 and 2,154.12

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Solution

The fourth proportional to 7,418.81, 11,128.23 and 2,154.12 is: 3,231.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.81 : 11,128.23 = 2,154.12 : x
  2. Step 2: Convert to fraction form
    7,418.81/11,128.23 = 2,154.12/x
  3. Step 3: Cross multiply
    7,418.81x = 11,128.23 × 2,154.12
  4. Step 4: Simplify right side
    7,418.81x = 23,971,542.81
  5. Step 5: Solve for x
    x = 23,971,542.81/7,418.81
  6. Step 6: Final answer
    x = 3,231.19

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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.