Home / 7,715.87-11,571.40-2,784.86

Finding the Fourth Proportional to 7,715.87, 11,571.40 and 2,784.86

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Solution

The fourth proportional to 7,715.87, 11,571.40 and 2,784.86 is: 4,176.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.87 : 11,571.40 = 2,784.86 : x
  2. Step 2: Convert to fraction form
    7,715.87/11,571.40 = 2,784.86/x
  3. Step 3: Cross multiply
    7,715.87x = 11,571.40 × 2,784.86
  4. Step 4: Simplify right side
    7,715.87x = 32,224,729.00
  5. Step 5: Solve for x
    x = 32,224,729.00/7,715.87
  6. Step 6: Final answer
    x = 4,176.42

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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.