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Finding the Fourth Proportional to 39,703.88, 54,791.99 and 21,800.50

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Solution

The fourth proportional to 39,703.88, 54,791.99 and 21,800.50 is: 30,085.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,703.88 : 54,791.99 = 21,800.50 : x
  2. Step 2: Convert to fraction form
    39,703.88/54,791.99 = 21,800.50/x
  3. Step 3: Cross multiply
    39,703.88x = 54,791.99 × 21,800.50
  4. Step 4: Simplify right side
    39,703.88x = 1,194,492,778.00
  5. Step 5: Solve for x
    x = 1,194,492,778.00/39,703.88
  6. Step 6: Final answer
    x = 30,085.04

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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.