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Finding the Fourth Proportional to 18,877.28, 28,309.44 and 7,193.84

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Solution

The fourth proportional to 18,877.28, 28,309.44 and 7,193.84 is: 10,788.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.28 : 28,309.44 = 7,193.84 : x
  2. Step 2: Convert to fraction form
    18,877.28/28,309.44 = 7,193.84/x
  3. Step 3: Cross multiply
    18,877.28x = 28,309.44 × 7,193.84
  4. Step 4: Simplify right side
    18,877.28x = 203,653,581.85
  5. Step 5: Solve for x
    x = 203,653,581.85/18,877.28
  6. Step 6: Final answer
    x = 10,788.29

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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.