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Finding the Fourth Proportional to 7,675.80, 11,505.60 and 4,381.80

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Solution

The fourth proportional to 7,675.80, 11,505.60 and 4,381.80 is: 6,568.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,675.80 : 11,505.60 = 4,381.80 : x
  2. Step 2: Convert to fraction form
    7,675.80/11,505.60 = 4,381.80/x
  3. Step 3: Cross multiply
    7,675.80x = 11,505.60 × 4,381.80
  4. Step 4: Simplify right side
    7,675.80x = 50,415,238.08
  5. Step 5: Solve for x
    x = 50,415,238.08/7,675.80
  6. Step 6: Final answer
    x = 6,568.08

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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.