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Finding the Fourth Proportional to 19,471.21, 26,870.79 and 11,917.39

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Solution

The fourth proportional to 19,471.21, 26,870.79 and 11,917.39 is: 16,446.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,471.21 : 26,870.79 = 11,917.39 : x
  2. Step 2: Convert to fraction form
    19,471.21/26,870.79 = 11,917.39/x
  3. Step 3: Cross multiply
    19,471.21x = 26,870.79 × 11,917.39
  4. Step 4: Simplify right side
    19,471.21x = 320,229,684.04
  5. Step 5: Solve for x
    x = 320,229,684.04/19,471.21
  6. Step 6: Final answer
    x = 16,446.32

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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.