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Finding the Fourth Proportional to 39,992.58, 55,188.71 and 22,087.20

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Solution

The fourth proportional to 39,992.58, 55,188.71 and 22,087.20 is: 30,479.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,992.58 : 55,188.71 = 22,087.20 : x
  2. Step 2: Convert to fraction form
    39,992.58/55,188.71 = 22,087.20/x
  3. Step 3: Cross multiply
    39,992.58x = 55,188.71 × 22,087.20
  4. Step 4: Simplify right side
    39,992.58x = 1,218,963,965.08
  5. Step 5: Solve for x
    x = 1,218,963,965.08/39,992.58
  6. Step 6: Final answer
    x = 30,479.75

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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.