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Finding the Fourth Proportional to 39,007.88, 53,830.73 and 21,102.73

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Solution

The fourth proportional to 39,007.88, 53,830.73 and 21,102.73 is: 29,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,007.88 : 53,830.73 = 21,102.73 : x
  2. Step 2: Convert to fraction form
    39,007.88/53,830.73 = 21,102.73/x
  3. Step 3: Cross multiply
    39,007.88x = 53,830.73 × 21,102.73
  4. Step 4: Simplify right side
    39,007.88x = 1,135,975,160.37
  5. Step 5: Solve for x
    x = 1,135,975,160.37/39,007.88
  6. Step 6: Final answer
    x = 29,121.69

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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.