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Finding the Fourth Proportional to 21,661.65, 32,495.73 and 9,181.74

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Solution

The fourth proportional to 21,661.65, 32,495.73 and 9,181.74 is: 13,773.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.65 : 32,495.73 = 9,181.74 : x
  2. Step 2: Convert to fraction form
    21,661.65/32,495.73 = 9,181.74/x
  3. Step 3: Cross multiply
    21,661.65x = 32,495.73 × 9,181.74
  4. Step 4: Simplify right side
    21,661.65x = 298,367,343.97
  5. Step 5: Solve for x
    x = 298,367,343.97/21,661.65
  6. Step 6: Final answer
    x = 13,773.99

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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.