Home / 39,685.43-54,766.55-21,782.09

Finding the Fourth Proportional to 39,685.43, 54,766.55 and 21,782.09

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Solution

The fourth proportional to 39,685.43, 54,766.55 and 21,782.09 is: 30,059.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.43 : 54,766.55 = 21,782.09 : x
  2. Step 2: Convert to fraction form
    39,685.43/54,766.55 = 21,782.09/x
  3. Step 3: Cross multiply
    39,685.43x = 54,766.55 × 21,782.09
  4. Step 4: Simplify right side
    39,685.43x = 1,192,929,538.35
  5. Step 5: Solve for x
    x = 1,192,929,538.35/39,685.43
  6. Step 6: Final answer
    x = 30,059.64

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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.