Home / 18,787.32-28,156.12-9,884.43

Finding the Fourth Proportional to 18,787.32, 28,156.12 and 9,884.43

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Solution

The fourth proportional to 18,787.32, 28,156.12 and 9,884.43 is: 14,813.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.32 : 28,156.12 = 9,884.43 : x
  2. Step 2: Convert to fraction form
    18,787.32/28,156.12 = 9,884.43/x
  3. Step 3: Cross multiply
    18,787.32x = 28,156.12 × 9,884.43
  4. Step 4: Simplify right side
    18,787.32x = 278,307,172.50
  5. Step 5: Solve for x
    x = 278,307,172.50/18,787.32
  6. Step 6: Final answer
    x = 14,813.56

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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.