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Finding the Fourth Proportional to 21,992.20, 32,939.70 and 18,104.20

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Solution

The fourth proportional to 21,992.20, 32,939.70 and 18,104.20 is: 27,116.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.20 : 32,939.70 = 18,104.20 : x
  2. Step 2: Convert to fraction form
    21,992.20/32,939.70 = 18,104.20/x
  3. Step 3: Cross multiply
    21,992.20x = 32,939.70 × 18,104.20
  4. Step 4: Simplify right side
    21,992.20x = 596,346,916.74
  5. Step 5: Solve for x
    x = 596,346,916.74/21,992.20
  6. Step 6: Final answer
    x = 27,116.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.