Home / 21,291.63-31,907.33-11,808.15

Finding the Fourth Proportional to 21,291.63, 31,907.33 and 11,808.15

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Solution

The fourth proportional to 21,291.63, 31,907.33 and 11,808.15 is: 17,695.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.63 : 31,907.33 = 11,808.15 : x
  2. Step 2: Convert to fraction form
    21,291.63/31,907.33 = 11,808.15/x
  3. Step 3: Cross multiply
    21,291.63x = 31,907.33 × 11,808.15
  4. Step 4: Simplify right side
    21,291.63x = 376,766,404.33
  5. Step 5: Solve for x
    x = 376,766,404.33/21,291.63
  6. Step 6: Final answer
    x = 17,695.52

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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.