Home / 21,103.84-29,121.34-11,672.20

Finding the Fourth Proportional to 21,103.84, 29,121.34 and 11,672.20

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Solution

The fourth proportional to 21,103.84, 29,121.34 and 11,672.20 is: 16,106.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.84 : 29,121.34 = 11,672.20 : x
  2. Step 2: Convert to fraction form
    21,103.84/29,121.34 = 11,672.20/x
  3. Step 3: Cross multiply
    21,103.84x = 29,121.34 × 11,672.20
  4. Step 4: Simplify right side
    21,103.84x = 339,909,900.78
  5. Step 5: Solve for x
    x = 339,909,900.78/21,103.84
  6. Step 6: Final answer
    x = 16,106.55

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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.