Home / 5,428.48-8,143.75-2,141.60

Finding the Fourth Proportional to 5,428.48, 8,143.75 and 2,141.60

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Solution

The fourth proportional to 5,428.48, 8,143.75 and 2,141.60 is: 3,212.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.48 : 8,143.75 = 2,141.60 : x
  2. Step 2: Convert to fraction form
    5,428.48/8,143.75 = 2,141.60/x
  3. Step 3: Cross multiply
    5,428.48x = 8,143.75 × 2,141.60
  4. Step 4: Simplify right side
    5,428.48x = 17,440,655
  5. Step 5: Solve for x
    x = 17,440,655/5,428.48
  6. Step 6: Final answer
    x = 3,212.81

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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.