Home / 21,149.92-31,690.84-13,772.44

Finding the Fourth Proportional to 21,149.92, 31,690.84 and 13,772.44

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Solution

The fourth proportional to 21,149.92, 31,690.84 and 13,772.44 is: 20,636.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.92 : 31,690.84 = 13,772.44 : x
  2. Step 2: Convert to fraction form
    21,149.92/31,690.84 = 13,772.44/x
  3. Step 3: Cross multiply
    21,149.92x = 31,690.84 × 13,772.44
  4. Step 4: Simplify right side
    21,149.92x = 436,460,192.45
  5. Step 5: Solve for x
    x = 436,460,192.45/21,149.92
  6. Step 6: Final answer
    x = 20,636.49

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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.