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Finding the Fourth Proportional to 18,015.92, 26,998.16 and 8,130.64

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Solution

The fourth proportional to 18,015.92, 26,998.16 and 8,130.64 is: 12,184.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.92 : 26,998.16 = 8,130.64 : x
  2. Step 2: Convert to fraction form
    18,015.92/26,998.16 = 8,130.64/x
  3. Step 3: Cross multiply
    18,015.92x = 26,998.16 × 8,130.64
  4. Step 4: Simplify right side
    18,015.92x = 219,512,319.62
  5. Step 5: Solve for x
    x = 219,512,319.62/18,015.92
  6. Step 6: Final answer
    x = 12,184.35

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1.5x scale

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.