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Finding the Fourth Proportional to 21,661.89, 32,493.99 and 6,871.95

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Solution

The fourth proportional to 21,661.89, 32,493.99 and 6,871.95 is: 10,308.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.89 : 32,493.99 = 6,871.95 : x
  2. Step 2: Convert to fraction form
    21,661.89/32,493.99 = 6,871.95/x
  3. Step 3: Cross multiply
    21,661.89x = 32,493.99 × 6,871.95
  4. Step 4: Simplify right side
    21,661.89x = 223,296,877.75
  5. Step 5: Solve for x
    x = 223,296,877.75/21,661.89
  6. Step 6: Final answer
    x = 10,308.28

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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.