Home / 8,646.78-11,921.64-5,657.88

Finding the Fourth Proportional to 8,646.78, 11,921.64 and 5,657.88

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Solution

The fourth proportional to 8,646.78, 11,921.64 and 5,657.88 is: 7,800.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,646.78 : 11,921.64 = 5,657.88 : x
  2. Step 2: Convert to fraction form
    8,646.78/11,921.64 = 5,657.88/x
  3. Step 3: Cross multiply
    8,646.78x = 11,921.64 × 5,657.88
  4. Step 4: Simplify right side
    8,646.78x = 67,451,208.52
  5. Step 5: Solve for x
    x = 67,451,208.52/8,646.78
  6. Step 6: Final answer
    x = 7,800.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.