Home / 22,279.42-30,744.24-12,720.40

Finding the Fourth Proportional to 22,279.42, 30,744.24 and 12,720.40

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Solution

The fourth proportional to 22,279.42, 30,744.24 and 12,720.40 is: 17,553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,279.42 : 30,744.24 = 12,720.40 : x
  2. Step 2: Convert to fraction form
    22,279.42/30,744.24 = 12,720.40/x
  3. Step 3: Cross multiply
    22,279.42x = 30,744.24 × 12,720.40
  4. Step 4: Simplify right side
    22,279.42x = 391,079,030.50
  5. Step 5: Solve for x
    x = 391,079,030.50/22,279.42
  6. Step 6: Final answer
    x = 17,553.38

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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.