Home / 7,418.96-11,128.41-1,872.74

Finding the Fourth Proportional to 7,418.96, 11,128.41 and 1,872.74

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Solution

The fourth proportional to 7,418.96, 11,128.41 and 1,872.74 is: 2,809.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.96 : 11,128.41 = 1,872.74 : x
  2. Step 2: Convert to fraction form
    7,418.96/11,128.41 = 1,872.74/x
  3. Step 3: Cross multiply
    7,418.96x = 11,128.41 × 1,872.74
  4. Step 4: Simplify right side
    7,418.96x = 20,840,646.36
  5. Step 5: Solve for x
    x = 20,840,646.36/7,418.96
  6. Step 6: Final answer
    x = 2,809.11

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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.