Home / 12,321.80-16,969.56-11,531.24

Finding the Fourth Proportional to 12,321.80, 16,969.56 and 11,531.24

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Solution

The fourth proportional to 12,321.80, 16,969.56 and 11,531.24 is: 15,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.80 : 16,969.56 = 11,531.24 : x
  2. Step 2: Convert to fraction form
    12,321.80/16,969.56 = 11,531.24/x
  3. Step 3: Cross multiply
    12,321.80x = 16,969.56 × 11,531.24
  4. Step 4: Simplify right side
    12,321.80x = 195,680,069.05
  5. Step 5: Solve for x
    x = 195,680,069.05/12,321.80
  6. Step 6: Final answer
    x = 15,880.80

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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.