Home / 21,118.53-29,142.05-11,687.25

Finding the Fourth Proportional to 21,118.53, 29,142.05 and 11,687.25

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Solution

The fourth proportional to 21,118.53, 29,142.05 and 11,687.25 is: 16,127.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.53 : 29,142.05 = 11,687.25 : x
  2. Step 2: Convert to fraction form
    21,118.53/29,142.05 = 11,687.25/x
  3. Step 3: Cross multiply
    21,118.53x = 29,142.05 × 11,687.25
  4. Step 4: Simplify right side
    21,118.53x = 340,590,365.43
  5. Step 5: Solve for x
    x = 340,590,365.43/21,118.53
  6. Step 6: Final answer
    x = 16,127.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.