Home / 5,431.58-8,141.90-2,143.40

Finding the Fourth Proportional to 5,431.58, 8,141.90 and 2,143.40

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Solution

The fourth proportional to 5,431.58, 8,141.90 and 2,143.40 is: 3,212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.58 : 8,141.90 = 2,143.40 : x
  2. Step 2: Convert to fraction form
    5,431.58/8,141.90 = 2,143.40/x
  3. Step 3: Cross multiply
    5,431.58x = 8,141.90 × 2,143.40
  4. Step 4: Simplify right side
    5,431.58x = 17,451,348.46
  5. Step 5: Solve for x
    x = 17,451,348.46/5,431.58
  6. Step 6: Final answer
    x = 3,212.94

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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.