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Finding the Fourth Proportional to 19,471.28, 26,861 and 12,754

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Solution

The fourth proportional to 19,471.28, 26,861 and 12,754 is: 17,594.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,471.28 : 26,861 = 12,754 : x
  2. Step 2: Convert to fraction form
    19,471.28/26,861 = 12,754/x
  3. Step 3: Cross multiply
    19,471.28x = 26,861 × 12,754
  4. Step 4: Simplify right side
    19,471.28x = 342,585,194
  5. Step 5: Solve for x
    x = 342,585,194/19,471.28
  6. Step 6: Final answer
    x = 17,594.38

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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.