Home / 27,992.30-38,632.10-20,906.42

Finding the Fourth Proportional to 27,992.30, 38,632.10 and 20,906.42

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Solution

The fourth proportional to 27,992.30, 38,632.10 and 20,906.42 is: 28,852.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,992.30 : 38,632.10 = 20,906.42 : x
  2. Step 2: Convert to fraction form
    27,992.30/38,632.10 = 20,906.42/x
  3. Step 3: Cross multiply
    27,992.30x = 38,632.10 × 20,906.42
  4. Step 4: Simplify right side
    27,992.30x = 807,658,908.08
  5. Step 5: Solve for x
    x = 807,658,908.08/27,992.30
  6. Step 6: Final answer
    x = 28,852.90

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Half scale
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Double scale
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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.