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Finding the Fourth Proportional to 12,138.76, 16,751.10 and 6,832.86

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Solution

The fourth proportional to 12,138.76, 16,751.10 and 6,832.86 is: 9,429.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.76 : 16,751.10 = 6,832.86 : x
  2. Step 2: Convert to fraction form
    12,138.76/16,751.10 = 6,832.86/x
  3. Step 3: Cross multiply
    12,138.76x = 16,751.10 × 6,832.86
  4. Step 4: Simplify right side
    12,138.76x = 114,457,837.39
  5. Step 5: Solve for x
    x = 114,457,837.39/12,138.76
  6. Step 6: Final answer
    x = 9,429.12

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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.