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Finding the Fourth Proportional to 8,971.44, 12,380.70 and 4,992.53

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Solution

The fourth proportional to 8,971.44, 12,380.70 and 4,992.53 is: 6,889.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.44 : 12,380.70 = 4,992.53 : x
  2. Step 2: Convert to fraction form
    8,971.44/12,380.70 = 4,992.53/x
  3. Step 3: Cross multiply
    8,971.44x = 12,380.70 × 4,992.53
  4. Step 4: Simplify right side
    8,971.44x = 61,810,954.27
  5. Step 5: Solve for x
    x = 61,810,954.27/8,971.44
  6. Step 6: Final answer
    x = 6,889.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.