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Finding the Fourth Proportional to 18,813.84, 28,220.82 and 4,773.88

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Solution

The fourth proportional to 18,813.84, 28,220.82 and 4,773.88 is: 7,160.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.84 : 28,220.82 = 4,773.88 : x
  2. Step 2: Convert to fraction form
    18,813.84/28,220.82 = 4,773.88/x
  3. Step 3: Cross multiply
    18,813.84x = 28,220.82 × 4,773.88
  4. Step 4: Simplify right side
    18,813.84x = 134,722,808.18
  5. Step 5: Solve for x
    x = 134,722,808.18/18,813.84
  6. Step 6: Final answer
    x = 7,160.84

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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.