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Finding the Fourth Proportional to 43,471.32, 65,205.71 and 13,890.93

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Solution

The fourth proportional to 43,471.32, 65,205.71 and 13,890.93 is: 20,835.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,471.32 : 65,205.71 = 13,890.93 : x
  2. Step 2: Convert to fraction form
    43,471.32/65,205.71 = 13,890.93/x
  3. Step 3: Cross multiply
    43,471.32x = 65,205.71 × 13,890.93
  4. Step 4: Simplify right side
    43,471.32x = 905,767,691.33
  5. Step 5: Solve for x
    x = 905,767,691.33/43,471.32
  6. Step 6: Final answer
    x = 20,835.98

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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.