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Finding the Fourth Proportional to 18,919.92, 26,111.28 and 14,131.56

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Solution

The fourth proportional to 18,919.92, 26,111.28 and 14,131.56 is: 19,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.92 : 26,111.28 = 14,131.56 : x
  2. Step 2: Convert to fraction form
    18,919.92/26,111.28 = 14,131.56/x
  3. Step 3: Cross multiply
    18,919.92x = 26,111.28 × 14,131.56
  4. Step 4: Simplify right side
    18,919.92x = 368,993,120.00
  5. Step 5: Solve for x
    x = 368,993,120.00/18,919.92
  6. Step 6: Final answer
    x = 19,502.89

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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.