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Finding the Fourth Proportional to 19,223.68, 28,836.72 and 8,128.32

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Solution

The fourth proportional to 19,223.68, 28,836.72 and 8,128.32 is: 12,192.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,223.68 : 28,836.72 = 8,128.32 : x
  2. Step 2: Convert to fraction form
    19,223.68/28,836.72 = 8,128.32/x
  3. Step 3: Cross multiply
    19,223.68x = 28,836.72 × 8,128.32
  4. Step 4: Simplify right side
    19,223.68x = 234,394,087.91
  5. Step 5: Solve for x
    x = 234,394,087.91/19,223.68
  6. Step 6: Final answer
    x = 12,192.99

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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.