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Finding the Fourth Proportional to 21,608.91, 29,808.88 and 14,882.96

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Solution

The fourth proportional to 21,608.91, 29,808.88 and 14,882.96 is: 20,530.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,608.91 : 29,808.88 = 14,882.96 : x
  2. Step 2: Convert to fraction form
    21,608.91/29,808.88 = 14,882.96/x
  3. Step 3: Cross multiply
    21,608.91x = 29,808.88 × 14,882.96
  4. Step 4: Simplify right side
    21,608.91x = 443,644,406.00
  5. Step 5: Solve for x
    x = 443,644,406.00/21,608.91
  6. Step 6: Final answer
    x = 20,530.62

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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.