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Finding the Fourth Proportional to 14,435, 21,540.80 and 12,879.80

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Solution

The fourth proportional to 14,435, 21,540.80 and 12,879.80 is: 19,220.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,435 : 21,540.80 = 12,879.80 : x
  2. Step 2: Convert to fraction form
    14,435/21,540.80 = 12,879.80/x
  3. Step 3: Cross multiply
    14,435x = 21,540.80 × 12,879.80
  4. Step 4: Simplify right side
    14,435x = 277,441,195.84
  5. Step 5: Solve for x
    x = 277,441,195.84/14,435
  6. Step 6: Final answer
    x = 19,220.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.