Home / 21,310.89-31,975.55-11,438.63

Finding the Fourth Proportional to 21,310.89, 31,975.55 and 11,438.63

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Solution

The fourth proportional to 21,310.89, 31,975.55 and 11,438.63 is: 17,162.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.89 : 31,975.55 = 11,438.63 : x
  2. Step 2: Convert to fraction form
    21,310.89/31,975.55 = 11,438.63/x
  3. Step 3: Cross multiply
    21,310.89x = 31,975.55 × 11,438.63
  4. Step 4: Simplify right side
    21,310.89x = 365,756,268.43
  5. Step 5: Solve for x
    x = 365,756,268.43/21,310.89
  6. Step 6: Final answer
    x = 17,162.88

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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.