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Finding the Fourth Proportional to 7,818.62, 11,736.03 and 5,239.58

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Solution

The fourth proportional to 7,818.62, 11,736.03 and 5,239.58 is: 7,864.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,818.62 : 11,736.03 = 5,239.58 : x
  2. Step 2: Convert to fraction form
    7,818.62/11,736.03 = 5,239.58/x
  3. Step 3: Cross multiply
    7,818.62x = 11,736.03 × 5,239.58
  4. Step 4: Simplify right side
    7,818.62x = 61,491,868.07
  5. Step 5: Solve for x
    x = 61,491,868.07/7,818.62
  6. Step 6: Final answer
    x = 7,864.80

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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.