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Finding the Fourth Proportional to 21,603.70, 29,813.09 and 11,667.70

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Solution

The fourth proportional to 21,603.70, 29,813.09 and 11,667.70 is: 16,101.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,603.70 : 29,813.09 = 11,667.70 : x
  2. Step 2: Convert to fraction form
    21,603.70/29,813.09 = 11,667.70/x
  3. Step 3: Cross multiply
    21,603.70x = 29,813.09 × 11,667.70
  4. Step 4: Simplify right side
    21,603.70x = 347,849,982.79
  5. Step 5: Solve for x
    x = 347,849,982.79/21,603.70
  6. Step 6: Final answer
    x = 16,101.41

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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.