Home / 39,486.58-54,489.90-21,581.80

Finding the Fourth Proportional to 39,486.58, 54,489.90 and 21,581.80

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Solution

The fourth proportional to 39,486.58, 54,489.90 and 21,581.80 is: 29,782.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.58 : 54,489.90 = 21,581.80 : x
  2. Step 2: Convert to fraction form
    39,486.58/54,489.90 = 21,581.80/x
  3. Step 3: Cross multiply
    39,486.58x = 54,489.90 × 21,581.80
  4. Step 4: Simplify right side
    39,486.58x = 1,175,990,123.82
  5. Step 5: Solve for x
    x = 1,175,990,123.82/39,486.58
  6. Step 6: Final answer
    x = 29,782.02

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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.