Home / 7,428.72-11,144.31-3,531.81

Finding the Fourth Proportional to 7,428.72, 11,144.31 and 3,531.81

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Solution

The fourth proportional to 7,428.72, 11,144.31 and 3,531.81 is: 5,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.72 : 11,144.31 = 3,531.81 : x
  2. Step 2: Convert to fraction form
    7,428.72/11,144.31 = 3,531.81/x
  3. Step 3: Cross multiply
    7,428.72x = 11,144.31 × 3,531.81
  4. Step 4: Simplify right side
    7,428.72x = 39,359,585.50
  5. Step 5: Solve for x
    x = 39,359,585.50/7,428.72
  6. Step 6: Final answer
    x = 5,298.30

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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.