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Finding the Fourth Proportional to 7,675.70, 11,525.70 and 5,221.40

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Solution

The fourth proportional to 7,675.70, 11,525.70 and 5,221.40 is: 7,840.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,675.70 : 11,525.70 = 5,221.40 : x
  2. Step 2: Convert to fraction form
    7,675.70/11,525.70 = 5,221.40/x
  3. Step 3: Cross multiply
    7,675.70x = 11,525.70 × 5,221.40
  4. Step 4: Simplify right side
    7,675.70x = 60,180,289.98
  5. Step 5: Solve for x
    x = 60,180,289.98/7,675.70
  6. Step 6: Final answer
    x = 7,840.37

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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.