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Finding the Fourth Proportional to 18,884.30, 28,329.15 and 6,404.90

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Solution

The fourth proportional to 18,884.30, 28,329.15 and 6,404.90 is: 9,608.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,884.30 : 28,329.15 = 6,404.90 : x
  2. Step 2: Convert to fraction form
    18,884.30/28,329.15 = 6,404.90/x
  3. Step 3: Cross multiply
    18,884.30x = 28,329.15 × 6,404.90
  4. Step 4: Simplify right side
    18,884.30x = 181,445,372.84
  5. Step 5: Solve for x
    x = 181,445,372.84/18,884.30
  6. Step 6: Final answer
    x = 9,608.27

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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.