Home / 7,618.78-11,429.52-2,691.28

Finding the Fourth Proportional to 7,618.78, 11,429.52 and 2,691.28

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Solution

The fourth proportional to 7,618.78, 11,429.52 and 2,691.28 is: 4,037.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.78 : 11,429.52 = 2,691.28 : x
  2. Step 2: Convert to fraction form
    7,618.78/11,429.52 = 2,691.28/x
  3. Step 3: Cross multiply
    7,618.78x = 11,429.52 × 2,691.28
  4. Step 4: Simplify right side
    7,618.78x = 30,760,038.59
  5. Step 5: Solve for x
    x = 30,760,038.59/7,618.78
  6. Step 6: Final answer
    x = 4,037.40

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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.