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Finding the Fourth Proportional to 43,654.91, 65,453.67 and 21,159.63

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Solution

The fourth proportional to 43,654.91, 65,453.67 and 21,159.63 is: 31,725.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,654.91 : 65,453.67 = 21,159.63 : x
  2. Step 2: Convert to fraction form
    43,654.91/65,453.67 = 21,159.63/x
  3. Step 3: Cross multiply
    43,654.91x = 65,453.67 × 21,159.63
  4. Step 4: Simplify right side
    43,654.91x = 1,384,975,439.34
  5. Step 5: Solve for x
    x = 1,384,975,439.34/43,654.91
  6. Step 6: Final answer
    x = 31,725.54

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1.5x scale

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.