Home / 21,330.70-29,435-11,770.68

Finding the Fourth Proportional to 21,330.70, 29,435 and 11,770.68

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Solution

The fourth proportional to 21,330.70, 29,435 and 11,770.68 is: 16,242.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.70 : 29,435 = 11,770.68 : x
  2. Step 2: Convert to fraction form
    21,330.70/29,435 = 11,770.68/x
  3. Step 3: Cross multiply
    21,330.70x = 29,435 × 11,770.68
  4. Step 4: Simplify right side
    21,330.70x = 346,469,965.80
  5. Step 5: Solve for x
    x = 346,469,965.80/21,330.70
  6. Step 6: Final answer
    x = 16,242.78

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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.