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Finding the Fourth Proportional to 18,887.92, 26,062.96 and 12,768.94

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Solution

The fourth proportional to 18,887.92, 26,062.96 and 12,768.94 is: 17,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,887.92 : 26,062.96 = 12,768.94 : x
  2. Step 2: Convert to fraction form
    18,887.92/26,062.96 = 12,768.94/x
  3. Step 3: Cross multiply
    18,887.92x = 26,062.96 × 12,768.94
  4. Step 4: Simplify right side
    18,887.92x = 332,796,284.59
  5. Step 5: Solve for x
    x = 332,796,284.59/18,887.92
  6. Step 6: Final answer
    x = 17,619.53

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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.