Home / 31,122.30-46,610.55-21,207.90

Finding the Fourth Proportional to 31,122.30, 46,610.55 and 21,207.90

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Solution

The fourth proportional to 31,122.30, 46,610.55 and 21,207.90 is: 31,762.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,122.30 : 46,610.55 = 21,207.90 : x
  2. Step 2: Convert to fraction form
    31,122.30/46,610.55 = 21,207.90/x
  3. Step 3: Cross multiply
    31,122.30x = 46,610.55 × 21,207.90
  4. Step 4: Simplify right side
    31,122.30x = 988,511,883.35
  5. Step 5: Solve for x
    x = 988,511,883.35/31,122.30
  6. Step 6: Final answer
    x = 31,762.17

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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.