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Finding the Fourth Proportional to 39,571.98, 54,609.32 and 21,666.98

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Solution

The fourth proportional to 39,571.98, 54,609.32 and 21,666.98 is: 29,900.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,571.98 : 54,609.32 = 21,666.98 : x
  2. Step 2: Convert to fraction form
    39,571.98/54,609.32 = 21,666.98/x
  3. Step 3: Cross multiply
    39,571.98x = 54,609.32 × 21,666.98
  4. Step 4: Simplify right side
    39,571.98x = 1,183,219,044.25
  5. Step 5: Solve for x
    x = 1,183,219,044.25/39,571.98
  6. Step 6: Final answer
    x = 29,900.43

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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.