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Finding the Fourth Proportional to 22,390.76, 33,356.44 and 21,379.88

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Solution

The fourth proportional to 22,390.76, 33,356.44 and 21,379.88 is: 31,850.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,390.76 : 33,356.44 = 21,379.88 : x
  2. Step 2: Convert to fraction form
    22,390.76/33,356.44 = 21,379.88/x
  3. Step 3: Cross multiply
    22,390.76x = 33,356.44 × 21,379.88
  4. Step 4: Simplify right side
    22,390.76x = 713,156,684.43
  5. Step 5: Solve for x
    x = 713,156,684.43/22,390.76
  6. Step 6: Final answer
    x = 31,850.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.