Home / 21,144.74-29,172.26-12,640.96

Finding the Fourth Proportional to 21,144.74, 29,172.26 and 12,640.96

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Solution

The fourth proportional to 21,144.74, 29,172.26 and 12,640.96 is: 17,440.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.74 : 29,172.26 = 12,640.96 : x
  2. Step 2: Convert to fraction form
    21,144.74/29,172.26 = 12,640.96/x
  3. Step 3: Cross multiply
    21,144.74x = 29,172.26 × 12,640.96
  4. Step 4: Simplify right side
    21,144.74x = 368,765,371.77
  5. Step 5: Solve for x
    x = 368,765,371.77/21,144.74
  6. Step 6: Final answer
    x = 17,440.05

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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.