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Finding the Fourth Proportional to 21,661.54, 32,504.79 and 9,180.58

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Solution

The fourth proportional to 21,661.54, 32,504.79 and 9,180.58 is: 13,776.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.54 : 32,504.79 = 9,180.58 : x
  2. Step 2: Convert to fraction form
    21,661.54/32,504.79 = 9,180.58/x
  3. Step 3: Cross multiply
    21,661.54x = 32,504.79 × 9,180.58
  4. Step 4: Simplify right side
    21,661.54x = 298,412,824.98
  5. Step 5: Solve for x
    x = 298,412,824.98/21,661.54
  6. Step 6: Final answer
    x = 13,776.16

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1.5x scale

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.