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Finding the Fourth Proportional to 21,778.60, 32,670.78 and 6,982.60

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Solution

The fourth proportional to 21,778.60, 32,670.78 and 6,982.60 is: 10,474.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.60 : 32,670.78 = 6,982.60 : x
  2. Step 2: Convert to fraction form
    21,778.60/32,670.78 = 6,982.60/x
  3. Step 3: Cross multiply
    21,778.60x = 32,670.78 × 6,982.60
  4. Step 4: Simplify right side
    21,778.60x = 228,126,988.43
  5. Step 5: Solve for x
    x = 228,126,988.43/21,778.60
  6. Step 6: Final answer
    x = 10,474.82

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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.