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Finding the Fourth Proportional to 22,428.40, 33,639.90 and 9,279.22

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Solution

The fourth proportional to 22,428.40, 33,639.90 and 9,279.22 is: 13,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,428.40 : 33,639.90 = 9,279.22 : x
  2. Step 2: Convert to fraction form
    22,428.40/33,639.90 = 9,279.22/x
  3. Step 3: Cross multiply
    22,428.40x = 33,639.90 × 9,279.22
  4. Step 4: Simplify right side
    22,428.40x = 312,152,032.88
  5. Step 5: Solve for x
    x = 312,152,032.88/22,428.40
  6. Step 6: Final answer
    x = 13,917.71

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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.