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Finding the Fourth Proportional to 11,571.88, 15,977.12 and 7,385.80

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Solution

The fourth proportional to 11,571.88, 15,977.12 and 7,385.80 is: 10,197.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,571.88 : 15,977.12 = 7,385.80 : x
  2. Step 2: Convert to fraction form
    11,571.88/15,977.12 = 7,385.80/x
  3. Step 3: Cross multiply
    11,571.88x = 15,977.12 × 7,385.80
  4. Step 4: Simplify right side
    11,571.88x = 118,003,812.90
  5. Step 5: Solve for x
    x = 118,003,812.90/11,571.88
  6. Step 6: Final answer
    x = 10,197.46

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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.