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Finding the Fourth Proportional to 13,808.88, 20,720.64 and 10,542.96

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Solution

The fourth proportional to 13,808.88, 20,720.64 and 10,542.96 is: 15,820.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.88 : 20,720.64 = 10,542.96 : x
  2. Step 2: Convert to fraction form
    13,808.88/20,720.64 = 10,542.96/x
  3. Step 3: Cross multiply
    13,808.88x = 20,720.64 × 10,542.96
  4. Step 4: Simplify right side
    13,808.88x = 218,456,878.69
  5. Step 5: Solve for x
    x = 218,456,878.69/13,808.88
  6. Step 6: Final answer
    x = 15,820.03

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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.