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Finding the Fourth Proportional to 18,672.84, 28,001.34 and 5,521.68

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Solution

The fourth proportional to 18,672.84, 28,001.34 and 5,521.68 is: 8,280.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.84 : 28,001.34 = 5,521.68 : x
  2. Step 2: Convert to fraction form
    18,672.84/28,001.34 = 5,521.68/x
  3. Step 3: Cross multiply
    18,672.84x = 28,001.34 × 5,521.68
  4. Step 4: Simplify right side
    18,672.84x = 154,614,439.05
  5. Step 5: Solve for x
    x = 154,614,439.05/18,672.84
  6. Step 6: Final answer
    x = 8,280.18

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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.