Home / 39,486.65-54,490.77-21,581.79

Finding the Fourth Proportional to 39,486.65, 54,490.77 and 21,581.79

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Solution

The fourth proportional to 39,486.65, 54,490.77 and 21,581.79 is: 29,782.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.65 : 54,490.77 = 21,581.79 : x
  2. Step 2: Convert to fraction form
    39,486.65/54,490.77 = 21,581.79/x
  3. Step 3: Cross multiply
    39,486.65x = 54,490.77 × 21,581.79
  4. Step 4: Simplify right side
    39,486.65x = 1,176,008,355.08
  5. Step 5: Solve for x
    x = 1,176,008,355.08/39,486.65
  6. Step 6: Final answer
    x = 29,782.43

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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.