Home / 21,739.70-29,996.83-12,788.98

Finding the Fourth Proportional to 21,739.70, 29,996.83 and 12,788.98

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Solution

The fourth proportional to 21,739.70, 29,996.83 and 12,788.98 is: 17,646.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.70 : 29,996.83 = 12,788.98 : x
  2. Step 2: Convert to fraction form
    21,739.70/29,996.83 = 12,788.98/x
  3. Step 3: Cross multiply
    21,739.70x = 29,996.83 × 12,788.98
  4. Step 4: Simplify right side
    21,739.70x = 383,628,858.93
  5. Step 5: Solve for x
    x = 383,628,858.93/21,739.70
  6. Step 6: Final answer
    x = 17,646.47

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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.