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Finding the Fourth Proportional to 7,858.99, 11,765.09 and 5,077.55

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Solution

The fourth proportional to 7,858.99, 11,765.09 and 5,077.55 is: 7,601.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.99 : 11,765.09 = 5,077.55 : x
  2. Step 2: Convert to fraction form
    7,858.99/11,765.09 = 5,077.55/x
  3. Step 3: Cross multiply
    7,858.99x = 11,765.09 × 5,077.55
  4. Step 4: Simplify right side
    7,858.99x = 59,737,832.73
  5. Step 5: Solve for x
    x = 59,737,832.73/7,858.99
  6. Step 6: Final answer
    x = 7,601.21

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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.