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Finding the Fourth Proportional to 39,662.61, 54,735.29 and 21,757.61

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Solution

The fourth proportional to 39,662.61, 54,735.29 and 21,757.61 is: 30,025.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,662.61 : 54,735.29 = 21,757.61 : x
  2. Step 2: Convert to fraction form
    39,662.61/54,735.29 = 21,757.61/x
  3. Step 3: Cross multiply
    39,662.61x = 54,735.29 × 21,757.61
  4. Step 4: Simplify right side
    39,662.61x = 1,190,909,325.08
  5. Step 5: Solve for x
    x = 1,190,909,325.08/39,662.61
  6. Step 6: Final answer
    x = 30,025.99

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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.