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Finding the Fourth Proportional to 7,897.77, 11,821.82 and 5,418.09

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Solution

The fourth proportional to 7,897.77, 11,821.82 and 5,418.09 is: 8,110.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,897.77 : 11,821.82 = 5,418.09 : x
  2. Step 2: Convert to fraction form
    7,897.77/11,821.82 = 5,418.09/x
  3. Step 3: Cross multiply
    7,897.77x = 11,821.82 × 5,418.09
  4. Step 4: Simplify right side
    7,897.77x = 64,051,657.63
  5. Step 5: Solve for x
    x = 64,051,657.63/7,897.77
  6. Step 6: Final answer
    x = 8,110.09

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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.