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Finding the Fourth Proportional to 18,912.88, 28,341.33 and 16,836.76

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Solution

The fourth proportional to 18,912.88, 28,341.33 and 16,836.76 is: 25,230.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.88 : 28,341.33 = 16,836.76 : x
  2. Step 2: Convert to fraction form
    18,912.88/28,341.33 = 16,836.76/x
  3. Step 3: Cross multiply
    18,912.88x = 28,341.33 × 16,836.76
  4. Step 4: Simplify right side
    18,912.88x = 477,176,171.29
  5. Step 5: Solve for x
    x = 477,176,171.29/18,912.88
  6. Step 6: Final answer
    x = 25,230.22

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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.