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Finding the Fourth Proportional to 8,779.70, 13,169.55 and 7,685.30

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Solution

The fourth proportional to 8,779.70, 13,169.55 and 7,685.30 is: 11,527.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,779.70 : 13,169.55 = 7,685.30 : x
  2. Step 2: Convert to fraction form
    8,779.70/13,169.55 = 7,685.30/x
  3. Step 3: Cross multiply
    8,779.70x = 13,169.55 × 7,685.30
  4. Step 4: Simplify right side
    8,779.70x = 101,211,942.62
  5. Step 5: Solve for x
    x = 101,211,942.62/8,779.70
  6. Step 6: Final answer
    x = 11,527.95

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Similar ratio
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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.