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Finding the Fourth Proportional to 13,755.76, 20,636.64 and 7,512.55

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Solution

The fourth proportional to 13,755.76, 20,636.64 and 7,512.55 is: 11,270.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.76 : 20,636.64 = 7,512.55 : x
  2. Step 2: Convert to fraction form
    13,755.76/20,636.64 = 7,512.55/x
  3. Step 3: Cross multiply
    13,755.76x = 20,636.64 × 7,512.55
  4. Step 4: Simplify right side
    13,755.76x = 155,033,738.24
  5. Step 5: Solve for x
    x = 155,033,738.24/13,755.76
  6. Step 6: Final answer
    x = 11,270.46

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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.