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Finding the Fourth Proportional to 27,489.99, 37,929.87 and 15,550.72

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Solution

The fourth proportional to 27,489.99, 37,929.87 and 15,550.72 is: 21,456.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,489.99 : 37,929.87 = 15,550.72 : x
  2. Step 2: Convert to fraction form
    27,489.99/37,929.87 = 15,550.72/x
  3. Step 3: Cross multiply
    27,489.99x = 37,929.87 × 15,550.72
  4. Step 4: Simplify right side
    27,489.99x = 589,836,788.01
  5. Step 5: Solve for x
    x = 589,836,788.01/27,489.99
  6. Step 6: Final answer
    x = 21,456.42

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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.