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Finding the Fourth Proportional to 20,699.52, 28,560.48 and 11,745

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Solution

The fourth proportional to 20,699.52, 28,560.48 and 11,745 is: 16,205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.52 : 28,560.48 = 11,745 : x
  2. Step 2: Convert to fraction form
    20,699.52/28,560.48 = 11,745/x
  3. Step 3: Cross multiply
    20,699.52x = 28,560.48 × 11,745
  4. Step 4: Simplify right side
    20,699.52x = 335,442,837.60
  5. Step 5: Solve for x
    x = 335,442,837.60/20,699.52
  6. Step 6: Final answer
    x = 16,205.34

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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.