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Finding the Fourth Proportional to 8,557.78, 11,813.98 and 5,375.69

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Solution

The fourth proportional to 8,557.78, 11,813.98 and 5,375.69 is: 7,421.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.78 : 11,813.98 = 5,375.69 : x
  2. Step 2: Convert to fraction form
    8,557.78/11,813.98 = 5,375.69/x
  3. Step 3: Cross multiply
    8,557.78x = 11,813.98 × 5,375.69
  4. Step 4: Simplify right side
    8,557.78x = 63,508,294.13
  5. Step 5: Solve for x
    x = 63,508,294.13/8,557.78
  6. Step 6: Final answer
    x = 7,421.12

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1.5x scale

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.