Home / 18,930.10-28,390.56-8,394.28

Finding the Fourth Proportional to 18,930.10, 28,390.56 and 8,394.28

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Solution

The fourth proportional to 18,930.10, 28,390.56 and 8,394.28 is: 12,589.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.10 : 28,390.56 = 8,394.28 : x
  2. Step 2: Convert to fraction form
    18,930.10/28,390.56 = 8,394.28/x
  3. Step 3: Cross multiply
    18,930.10x = 28,390.56 × 8,394.28
  4. Step 4: Simplify right side
    18,930.10x = 238,318,310.00
  5. Step 5: Solve for x
    x = 238,318,310.00/18,930.10
  6. Step 6: Final answer
    x = 12,589.38

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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.