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Finding the Fourth Proportional to 21,610.56, 32,415.85 and 6,820.64

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Solution

The fourth proportional to 21,610.56, 32,415.85 and 6,820.64 is: 10,230.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,610.56 : 32,415.85 = 6,820.64 : x
  2. Step 2: Convert to fraction form
    21,610.56/32,415.85 = 6,820.64/x
  3. Step 3: Cross multiply
    21,610.56x = 32,415.85 × 6,820.64
  4. Step 4: Simplify right side
    21,610.56x = 221,096,811.15
  5. Step 5: Solve for x
    x = 221,096,811.15/21,610.56
  6. Step 6: Final answer
    x = 10,230.96

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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.