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Finding the Fourth Proportional to 26,471.70, 39,671.10 and 17,561.70

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Solution

The fourth proportional to 26,471.70, 39,671.10 and 17,561.70 is: 26,318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,471.70 : 39,671.10 = 17,561.70 : x
  2. Step 2: Convert to fraction form
    26,471.70/39,671.10 = 17,561.70/x
  3. Step 3: Cross multiply
    26,471.70x = 39,671.10 × 17,561.70
  4. Step 4: Simplify right side
    26,471.70x = 696,691,956.87
  5. Step 5: Solve for x
    x = 696,691,956.87/26,471.70
  6. Step 6: Final answer
    x = 26,318.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.