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Finding the Fourth Proportional to 21,778.66, 32,648.64 and 7,736.83

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Solution

The fourth proportional to 21,778.66, 32,648.64 and 7,736.83 is: 11,598.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.66 : 32,648.64 = 7,736.83 : x
  2. Step 2: Convert to fraction form
    21,778.66/32,648.64 = 7,736.83/x
  3. Step 3: Cross multiply
    21,778.66x = 32,648.64 × 7,736.83
  4. Step 4: Simplify right side
    21,778.66x = 252,597,050.43
  5. Step 5: Solve for x
    x = 252,597,050.43/21,778.66
  6. Step 6: Final answer
    x = 11,598.38

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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.