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Finding the Fourth Proportional to 39,486.83, 54,491.85 and 21,581.83

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Solution

The fourth proportional to 39,486.83, 54,491.85 and 21,581.83 is: 29,782.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.83 : 54,491.85 = 21,581.83 : x
  2. Step 2: Convert to fraction form
    39,486.83/54,491.85 = 21,581.83/x
  3. Step 3: Cross multiply
    39,486.83x = 54,491.85 × 21,581.83
  4. Step 4: Simplify right side
    39,486.83x = 1,176,033,843.09
  5. Step 5: Solve for x
    x = 1,176,033,843.09/39,486.83
  6. Step 6: Final answer
    x = 29,782.94

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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.