Home / 21,429.81-29,575.67-11,996.55

Finding the Fourth Proportional to 21,429.81, 29,575.67 and 11,996.55

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Solution

The fourth proportional to 21,429.81, 29,575.67 and 11,996.55 is: 16,556.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.81 : 29,575.67 = 11,996.55 : x
  2. Step 2: Convert to fraction form
    21,429.81/29,575.67 = 11,996.55/x
  3. Step 3: Cross multiply
    21,429.81x = 29,575.67 × 11,996.55
  4. Step 4: Simplify right side
    21,429.81x = 354,805,943.96
  5. Step 5: Solve for x
    x = 354,805,943.96/21,429.81
  6. Step 6: Final answer
    x = 16,556.65

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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.