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Finding the Fourth Proportional to 10,945.12, 16,419 and 3,154

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Solution

The fourth proportional to 10,945.12, 16,419 and 3,154 is: 4,731.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,945.12 : 16,419 = 3,154 : x
  2. Step 2: Convert to fraction form
    10,945.12/16,419 = 3,154/x
  3. Step 3: Cross multiply
    10,945.12x = 16,419 × 3,154
  4. Step 4: Simplify right side
    10,945.12x = 51,785,526
  5. Step 5: Solve for x
    x = 51,785,526/10,945.12
  6. Step 6: Final answer
    x = 4,731.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.