Home / 21,965.15-32,969.60-12,109.07

Finding the Fourth Proportional to 21,965.15, 32,969.60 and 12,109.07

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Solution

The fourth proportional to 21,965.15, 32,969.60 and 12,109.07 is: 18,175.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,965.15 : 32,969.60 = 12,109.07 : x
  2. Step 2: Convert to fraction form
    21,965.15/32,969.60 = 12,109.07/x
  3. Step 3: Cross multiply
    21,965.15x = 32,969.60 × 12,109.07
  4. Step 4: Simplify right side
    21,965.15x = 399,231,194.27
  5. Step 5: Solve for x
    x = 399,231,194.27/21,965.15
  6. Step 6: Final answer
    x = 18,175.66

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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.