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Finding the Fourth Proportional to 20,639.44, 30,971.46 and 7,492.84

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Solution

The fourth proportional to 20,639.44, 30,971.46 and 7,492.84 is: 11,243.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.44 : 30,971.46 = 7,492.84 : x
  2. Step 2: Convert to fraction form
    20,639.44/30,971.46 = 7,492.84/x
  3. Step 3: Cross multiply
    20,639.44x = 30,971.46 × 7,492.84
  4. Step 4: Simplify right side
    20,639.44x = 232,064,194.35
  5. Step 5: Solve for x
    x = 232,064,194.35/20,639.44
  6. Step 6: Final answer
    x = 11,243.73

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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.