Home / 21,105.44-31,646.46-8,634.21

Finding the Fourth Proportional to 21,105.44, 31,646.46 and 8,634.21

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Solution

The fourth proportional to 21,105.44, 31,646.46 and 8,634.21 is: 12,946.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.44 : 31,646.46 = 8,634.21 : x
  2. Step 2: Convert to fraction form
    21,105.44/31,646.46 = 8,634.21/x
  3. Step 3: Cross multiply
    21,105.44x = 31,646.46 × 8,634.21
  4. Step 4: Simplify right side
    21,105.44x = 273,242,181.40
  5. Step 5: Solve for x
    x = 273,242,181.40/21,105.44
  6. Step 6: Final answer
    x = 12,946.53

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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.