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Finding the Fourth Proportional to 20,765.24, 28,656.24 and 11,333.96

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Solution

The fourth proportional to 20,765.24, 28,656.24 and 11,333.96 is: 15,640.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.24 : 28,656.24 = 11,333.96 : x
  2. Step 2: Convert to fraction form
    20,765.24/28,656.24 = 11,333.96/x
  3. Step 3: Cross multiply
    20,765.24x = 28,656.24 × 11,333.96
  4. Step 4: Simplify right side
    20,765.24x = 324,788,677.91
  5. Step 5: Solve for x
    x = 324,788,677.91/20,765.24
  6. Step 6: Final answer
    x = 15,640.98

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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.