Home / 7,418.81-11,128.23-1,872.15

Finding the Fourth Proportional to 7,418.81, 11,128.23 and 1,872.15

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Solution

The fourth proportional to 7,418.81, 11,128.23 and 1,872.15 is: 2,808.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.81 : 11,128.23 = 1,872.15 : x
  2. Step 2: Convert to fraction form
    7,418.81/11,128.23 = 1,872.15/x
  3. Step 3: Cross multiply
    7,418.81x = 11,128.23 × 1,872.15
  4. Step 4: Simplify right side
    7,418.81x = 20,833,736.66
  5. Step 5: Solve for x
    x = 20,833,736.66/7,418.81
  6. Step 6: Final answer
    x = 2,808.23

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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.