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Finding the Fourth Proportional to 19,471.59, 26,871.32 and 11,917.77

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Solution

The fourth proportional to 19,471.59, 26,871.32 and 11,917.77 is: 16,446.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,471.59 : 26,871.32 = 11,917.77 : x
  2. Step 2: Convert to fraction form
    19,471.59/26,871.32 = 11,917.77/x
  3. Step 3: Cross multiply
    19,471.59x = 26,871.32 × 11,917.77
  4. Step 4: Simplify right side
    19,471.59x = 320,246,211.36
  5. Step 5: Solve for x
    x = 320,246,211.36/19,471.59
  6. Step 6: Final answer
    x = 16,446.84

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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.