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Finding the Fourth Proportional to 21,596.91, 29,805.10 and 13,099.84

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Solution

The fourth proportional to 21,596.91, 29,805.10 and 13,099.84 is: 18,078.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,596.91 : 29,805.10 = 13,099.84 : x
  2. Step 2: Convert to fraction form
    21,596.91/29,805.10 = 13,099.84/x
  3. Step 3: Cross multiply
    21,596.91x = 29,805.10 × 13,099.84
  4. Step 4: Simplify right side
    21,596.91x = 390,442,101.58
  5. Step 5: Solve for x
    x = 390,442,101.58/21,596.91
  6. Step 6: Final answer
    x = 18,078.61

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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.