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Finding the Fourth Proportional to 39,443.86, 54,433.80 and 21,539.80

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Solution

The fourth proportional to 39,443.86, 54,433.80 and 21,539.80 is: 29,725.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,443.86 : 54,433.80 = 21,539.80 : x
  2. Step 2: Convert to fraction form
    39,443.86/54,433.80 = 21,539.80/x
  3. Step 3: Cross multiply
    39,443.86x = 54,433.80 × 21,539.80
  4. Step 4: Simplify right side
    39,443.86x = 1,172,493,165.24
  5. Step 5: Solve for x
    x = 1,172,493,165.24/39,443.86
  6. Step 6: Final answer
    x = 29,725.62

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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.