Home / 5,431-8,143.80-2,655.94

Finding the Fourth Proportional to 5,431, 8,143.80 and 2,655.94

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Solution

The fourth proportional to 5,431, 8,143.80 and 2,655.94 is: 3,982.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431 : 8,143.80 = 2,655.94 : x
  2. Step 2: Convert to fraction form
    5,431/8,143.80 = 2,655.94/x
  3. Step 3: Cross multiply
    5,431x = 8,143.80 × 2,655.94
  4. Step 4: Simplify right side
    5,431x = 21,629,444.17
  5. Step 5: Solve for x
    x = 21,629,444.17/5,431
  6. Step 6: Final answer
    x = 3,982.59

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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.