Home / 39,690.09-54,772.16-21,540.83

Finding the Fourth Proportional to 39,690.09, 54,772.16 and 21,540.83

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Solution

The fourth proportional to 39,690.09, 54,772.16 and 21,540.83 is: 29,726.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.09 : 54,772.16 = 21,540.83 : x
  2. Step 2: Convert to fraction form
    39,690.09/54,772.16 = 21,540.83/x
  3. Step 3: Cross multiply
    39,690.09x = 54,772.16 × 21,540.83
  4. Step 4: Simplify right side
    39,690.09x = 1,179,837,405.73
  5. Step 5: Solve for x
    x = 1,179,837,405.73/39,690.09
  6. Step 6: Final answer
    x = 29,726.25

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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.