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Finding the Fourth Proportional to 22,279.92, 30,744.93 and 12,720.90

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Solution

The fourth proportional to 22,279.92, 30,744.93 and 12,720.90 is: 17,554.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,279.92 : 30,744.93 = 12,720.90 : x
  2. Step 2: Convert to fraction form
    22,279.92/30,744.93 = 12,720.90/x
  3. Step 3: Cross multiply
    22,279.92x = 30,744.93 × 12,720.90
  4. Step 4: Simplify right side
    22,279.92x = 391,103,180.04
  5. Step 5: Solve for x
    x = 391,103,180.04/22,279.92
  6. Step 6: Final answer
    x = 17,554.07

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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.