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Finding the Fourth Proportional to 18,168.70, 25,073.13 and 10,999.30

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Solution

The fourth proportional to 18,168.70, 25,073.13 and 10,999.30 is: 15,179.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,168.70 : 25,073.13 = 10,999.30 : x
  2. Step 2: Convert to fraction form
    18,168.70/25,073.13 = 10,999.30/x
  3. Step 3: Cross multiply
    18,168.70x = 25,073.13 × 10,999.30
  4. Step 4: Simplify right side
    18,168.70x = 275,786,878.81
  5. Step 5: Solve for x
    x = 275,786,878.81/18,168.70
  6. Step 6: Final answer
    x = 15,179.23

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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.