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Finding the Fourth Proportional to 21,123, 29,147.04 and 12,170.88

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Solution

The fourth proportional to 21,123, 29,147.04 and 12,170.88 is: 16,794.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123 : 29,147.04 = 12,170.88 : x
  2. Step 2: Convert to fraction form
    21,123/29,147.04 = 12,170.88/x
  3. Step 3: Cross multiply
    21,123x = 29,147.04 × 12,170.88
  4. Step 4: Simplify right side
    21,123x = 354,745,126.20
  5. Step 5: Solve for x
    x = 354,745,126.20/21,123
  6. Step 6: Final answer
    x = 16,794.26

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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.