Home / 7,779.28-11,661.48-2,581.50

Finding the Fourth Proportional to 7,779.28, 11,661.48 and 2,581.50

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Solution

The fourth proportional to 7,779.28, 11,661.48 and 2,581.50 is: 3,869.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.28 : 11,661.48 = 2,581.50 : x
  2. Step 2: Convert to fraction form
    7,779.28/11,661.48 = 2,581.50/x
  3. Step 3: Cross multiply
    7,779.28x = 11,661.48 × 2,581.50
  4. Step 4: Simplify right side
    7,779.28x = 30,104,110.62
  5. Step 5: Solve for x
    x = 30,104,110.62/7,779.28
  6. Step 6: Final answer
    x = 3,869.78

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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.