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Finding the Fourth Proportional to 23,080, 31,850.40 and 13,145.92

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Solution

The fourth proportional to 23,080, 31,850.40 and 13,145.92 is: 18,141.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,080 : 31,850.40 = 13,145.92 : x
  2. Step 2: Convert to fraction form
    23,080/31,850.40 = 13,145.92/x
  3. Step 3: Cross multiply
    23,080x = 31,850.40 × 13,145.92
  4. Step 4: Simplify right side
    23,080x = 418,702,810.37
  5. Step 5: Solve for x
    x = 418,702,810.37/23,080
  6. Step 6: Final answer
    x = 18,141.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.