Home / 7,715.10-11,572.65-2,786.28

Finding the Fourth Proportional to 7,715.10, 11,572.65 and 2,786.28

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Solution

The fourth proportional to 7,715.10, 11,572.65 and 2,786.28 is: 4,179.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.10 : 11,572.65 = 2,786.28 : x
  2. Step 2: Convert to fraction form
    7,715.10/11,572.65 = 2,786.28/x
  3. Step 3: Cross multiply
    7,715.10x = 11,572.65 × 2,786.28
  4. Step 4: Simplify right side
    7,715.10x = 32,244,643.24
  5. Step 5: Solve for x
    x = 32,244,643.24/7,715.10
  6. Step 6: Final answer
    x = 4,179.42

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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.