Home / 39,630.89-54,690.38-21,726.65

Finding the Fourth Proportional to 39,630.89, 54,690.38 and 21,726.65

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Solution

The fourth proportional to 39,630.89, 54,690.38 and 21,726.65 is: 29,982.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,630.89 : 54,690.38 = 21,726.65 : x
  2. Step 2: Convert to fraction form
    39,630.89/54,690.38 = 21,726.65/x
  3. Step 3: Cross multiply
    39,630.89x = 54,690.38 × 21,726.65
  4. Step 4: Simplify right side
    39,630.89x = 1,188,238,362.54
  5. Step 5: Solve for x
    x = 1,188,238,362.54/39,630.89
  6. Step 6: Final answer
    x = 29,982.64

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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.