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Finding the Fourth Proportional to 13,179.90, 18,187.70 and 8,073.87

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Solution

The fourth proportional to 13,179.90, 18,187.70 and 8,073.87 is: 11,141.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.90 : 18,187.70 = 8,073.87 : x
  2. Step 2: Convert to fraction form
    13,179.90/18,187.70 = 8,073.87/x
  3. Step 3: Cross multiply
    13,179.90x = 18,187.70 × 8,073.87
  4. Step 4: Simplify right side
    13,179.90x = 146,845,125.40
  5. Step 5: Solve for x
    x = 146,845,125.40/13,179.90
  6. Step 6: Final answer
    x = 11,141.60

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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.