Home / 21,107.12-31,668.27-9,872.48

Finding the Fourth Proportional to 21,107.12, 31,668.27 and 9,872.48

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Solution

The fourth proportional to 21,107.12, 31,668.27 and 9,872.48 is: 14,812.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.12 : 31,668.27 = 9,872.48 : x
  2. Step 2: Convert to fraction form
    21,107.12/31,668.27 = 9,872.48/x
  3. Step 3: Cross multiply
    21,107.12x = 31,668.27 × 9,872.48
  4. Step 4: Simplify right side
    21,107.12x = 312,644,362.21
  5. Step 5: Solve for x
    x = 312,644,362.21/21,107.12
  6. Step 6: Final answer
    x = 14,812.27

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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.