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Finding the Fourth Proportional to 18,626.15, 25,686.50 and 11,900.12

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Solution

The fourth proportional to 18,626.15, 25,686.50 and 11,900.12 is: 16,410.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,626.15 : 25,686.50 = 11,900.12 : x
  2. Step 2: Convert to fraction form
    18,626.15/25,686.50 = 11,900.12/x
  3. Step 3: Cross multiply
    18,626.15x = 25,686.50 × 11,900.12
  4. Step 4: Simplify right side
    18,626.15x = 305,672,244.45
  5. Step 5: Solve for x
    x = 305,672,244.45/18,626.15
  6. Step 6: Final answer
    x = 16,410.92

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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.