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Finding the Fourth Proportional to 10,779.99, 16,169.99 and 4,919.19

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Solution

The fourth proportional to 10,779.99, 16,169.99 and 4,919.19 is: 7,378.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,779.99 : 16,169.99 = 4,919.19 : x
  2. Step 2: Convert to fraction form
    10,779.99/16,169.99 = 4,919.19/x
  3. Step 3: Cross multiply
    10,779.99x = 16,169.99 × 4,919.19
  4. Step 4: Simplify right side
    10,779.99x = 79,543,228.51
  5. Step 5: Solve for x
    x = 79,543,228.51/10,779.99
  6. Step 6: Final answer
    x = 7,378.79

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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.