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Finding the Fourth Proportional to 21,911.25, 30,237.53 and 11,975.25

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Solution

The fourth proportional to 21,911.25, 30,237.53 and 11,975.25 is: 16,525.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.25 : 30,237.53 = 11,975.25 : x
  2. Step 2: Convert to fraction form
    21,911.25/30,237.53 = 11,975.25/x
  3. Step 3: Cross multiply
    21,911.25x = 30,237.53 × 11,975.25
  4. Step 4: Simplify right side
    21,911.25x = 362,101,921.26
  5. Step 5: Solve for x
    x = 362,101,921.26/21,911.25
  6. Step 6: Final answer
    x = 16,525.85

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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.