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Finding the Fourth Proportional to 21,710.81, 29,960.92 and 11,774.81

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Solution

The fourth proportional to 21,710.81, 29,960.92 and 11,774.81 is: 16,249.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.81 : 29,960.92 = 11,774.81 : x
  2. Step 2: Convert to fraction form
    21,710.81/29,960.92 = 11,774.81/x
  3. Step 3: Cross multiply
    21,710.81x = 29,960.92 × 11,774.81
  4. Step 4: Simplify right side
    21,710.81x = 352,784,230.05
  5. Step 5: Solve for x
    x = 352,784,230.05/21,710.81
  6. Step 6: Final answer
    x = 16,249.24

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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.