Home / 21,134.89-31,716.18-7,987.26

Finding the Fourth Proportional to 21,134.89, 31,716.18 and 7,987.26

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Solution

The fourth proportional to 21,134.89, 31,716.18 and 7,987.26 is: 11,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,134.89 : 31,716.18 = 7,987.26 : x
  2. Step 2: Convert to fraction form
    21,134.89/31,716.18 = 7,987.26/x
  3. Step 3: Cross multiply
    21,134.89x = 31,716.18 × 7,987.26
  4. Step 4: Simplify right side
    21,134.89x = 253,325,494.80
  5. Step 5: Solve for x
    x = 253,325,494.80/21,134.89
  6. Step 6: Final answer
    x = 11,986.13

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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.