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Finding the Fourth Proportional to 18,779.96, 28,161.42 and 7,084.88

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Solution

The fourth proportional to 18,779.96, 28,161.42 and 7,084.88 is: 10,624.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.96 : 28,161.42 = 7,084.88 : x
  2. Step 2: Convert to fraction form
    18,779.96/28,161.42 = 7,084.88/x
  3. Step 3: Cross multiply
    18,779.96x = 28,161.42 × 7,084.88
  4. Step 4: Simplify right side
    18,779.96x = 199,520,281.33
  5. Step 5: Solve for x
    x = 199,520,281.33/18,779.96
  6. Step 6: Final answer
    x = 10,624.11

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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.