Home / 18,914.70-28,363.85-6,431.38

Finding the Fourth Proportional to 18,914.70, 28,363.85 and 6,431.38

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Solution

The fourth proportional to 18,914.70, 28,363.85 and 6,431.38 is: 9,644.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,914.70 : 28,363.85 = 6,431.38 : x
  2. Step 2: Convert to fraction form
    18,914.70/28,363.85 = 6,431.38/x
  3. Step 3: Cross multiply
    18,914.70x = 28,363.85 × 6,431.38
  4. Step 4: Simplify right side
    18,914.70x = 182,418,594.55
  5. Step 5: Solve for x
    x = 182,418,594.55/18,914.70
  6. Step 6: Final answer
    x = 9,644.28

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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.