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Finding the Fourth Proportional to 11,897.78, 17,818.25 and 6,619.68

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Solution

The fourth proportional to 11,897.78, 17,818.25 and 6,619.68 is: 9,913.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,897.78 : 17,818.25 = 6,619.68 : x
  2. Step 2: Convert to fraction form
    11,897.78/17,818.25 = 6,619.68/x
  3. Step 3: Cross multiply
    11,897.78x = 17,818.25 × 6,619.68
  4. Step 4: Simplify right side
    11,897.78x = 117,951,080.06
  5. Step 5: Solve for x
    x = 117,951,080.06/11,897.78
  6. Step 6: Final answer
    x = 9,913.71

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1.5x scale

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.