Home / 7,721.28-11,581.83-1,877.90

Finding the Fourth Proportional to 7,721.28, 11,581.83 and 1,877.90

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Solution

The fourth proportional to 7,721.28, 11,581.83 and 1,877.90 is: 2,816.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.28 : 11,581.83 = 1,877.90 : x
  2. Step 2: Convert to fraction form
    7,721.28/11,581.83 = 1,877.90/x
  3. Step 3: Cross multiply
    7,721.28x = 11,581.83 × 1,877.90
  4. Step 4: Simplify right side
    7,721.28x = 21,749,460.65
  5. Step 5: Solve for x
    x = 21,749,460.65/7,721.28
  6. Step 6: Final answer
    x = 2,816.82

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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.