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Finding the Fourth Proportional to 20,765.88, 28,656.48 and 11,334.48

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Solution

The fourth proportional to 20,765.88, 28,656.48 and 11,334.48 is: 15,641.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.88 : 28,656.48 = 11,334.48 : x
  2. Step 2: Convert to fraction form
    20,765.88/28,656.48 = 11,334.48/x
  3. Step 3: Cross multiply
    20,765.88x = 28,656.48 × 11,334.48
  4. Step 4: Simplify right side
    20,765.88x = 324,806,299.43
  5. Step 5: Solve for x
    x = 324,806,299.43/20,765.88
  6. Step 6: Final answer
    x = 15,641.35

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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.