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Finding the Fourth Proportional to 9,190.55, 13,779.90 and 3,928.99

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Solution

The fourth proportional to 9,190.55, 13,779.90 and 3,928.99 is: 5,890.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,190.55 : 13,779.90 = 3,928.99 : x
  2. Step 2: Convert to fraction form
    9,190.55/13,779.90 = 3,928.99/x
  3. Step 3: Cross multiply
    9,190.55x = 13,779.90 × 3,928.99
  4. Step 4: Simplify right side
    9,190.55x = 54,141,089.30
  5. Step 5: Solve for x
    x = 54,141,089.30/9,190.55
  6. Step 6: Final answer
    x = 5,890.95

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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.