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Finding the Fourth Proportional to 20,623, 28,463.98 and 11,671

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Solution

The fourth proportional to 20,623, 28,463.98 and 11,671 is: 16,108.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623 : 28,463.98 = 11,671 : x
  2. Step 2: Convert to fraction form
    20,623/28,463.98 = 11,671/x
  3. Step 3: Cross multiply
    20,623x = 28,463.98 × 11,671
  4. Step 4: Simplify right side
    20,623x = 332,203,110.58
  5. Step 5: Solve for x
    x = 332,203,110.58/20,623
  6. Step 6: Final answer
    x = 16,108.38

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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.