Home / 21,218.44-31,815.24-6,423

Finding the Fourth Proportional to 21,218.44, 31,815.24 and 6,423

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Solution

The fourth proportional to 21,218.44, 31,815.24 and 6,423 is: 9,630.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.44 : 31,815.24 = 6,423 : x
  2. Step 2: Convert to fraction form
    21,218.44/31,815.24 = 6,423/x
  3. Step 3: Cross multiply
    21,218.44x = 31,815.24 × 6,423
  4. Step 4: Simplify right side
    21,218.44x = 204,349,286.52
  5. Step 5: Solve for x
    x = 204,349,286.52/21,218.44
  6. Step 6: Final answer
    x = 9,630.74

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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.