Home / 7,719.78-11,579.58-1,876.40

Finding the Fourth Proportional to 7,719.78, 11,579.58 and 1,876.40

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Solution

The fourth proportional to 7,719.78, 11,579.58 and 1,876.40 is: 2,814.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.78 : 11,579.58 = 1,876.40 : x
  2. Step 2: Convert to fraction form
    7,719.78/11,579.58 = 1,876.40/x
  3. Step 3: Cross multiply
    7,719.78x = 11,579.58 × 1,876.40
  4. Step 4: Simplify right side
    7,719.78x = 21,727,866.01
  5. Step 5: Solve for x
    x = 21,727,866.01/7,719.78
  6. Step 6: Final answer
    x = 2,814.57

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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.