Home / 21,087.42-31,631.13-5,505.06

Finding the Fourth Proportional to 21,087.42, 31,631.13 and 5,505.06

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Solution

The fourth proportional to 21,087.42, 31,631.13 and 5,505.06 is: 8,257.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.42 : 31,631.13 = 5,505.06 : x
  2. Step 2: Convert to fraction form
    21,087.42/31,631.13 = 5,505.06/x
  3. Step 3: Cross multiply
    21,087.42x = 31,631.13 × 5,505.06
  4. Step 4: Simplify right side
    21,087.42x = 174,131,268.52
  5. Step 5: Solve for x
    x = 174,131,268.52/21,087.42
  6. Step 6: Final answer
    x = 8,257.59

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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.