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Finding the Fourth Proportional to 19,864.20, 29,820.60 and 10,986.60

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Solution

The fourth proportional to 19,864.20, 29,820.60 and 10,986.60 is: 16,493.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,864.20 : 29,820.60 = 10,986.60 : x
  2. Step 2: Convert to fraction form
    19,864.20/29,820.60 = 10,986.60/x
  3. Step 3: Cross multiply
    19,864.20x = 29,820.60 × 10,986.60
  4. Step 4: Simplify right side
    19,864.20x = 327,627,003.96
  5. Step 5: Solve for x
    x = 327,627,003.96/19,864.20
  6. Step 6: Final answer
    x = 16,493.34

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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.