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Finding the Fourth Proportional to 39,240, 58,860.54 and 21,744

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Solution

The fourth proportional to 39,240, 58,860.54 and 21,744 is: 32,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,240 : 58,860.54 = 21,744 : x
  2. Step 2: Convert to fraction form
    39,240/58,860.54 = 21,744/x
  3. Step 3: Cross multiply
    39,240x = 58,860.54 × 21,744
  4. Step 4: Simplify right side
    39,240x = 1,279,863,581.76
  5. Step 5: Solve for x
    x = 1,279,863,581.76/39,240
  6. Step 6: Final answer
    x = 32,616.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.