Home / 21,354.28-29,467.94-11,921

Finding the Fourth Proportional to 21,354.28, 29,467.94 and 11,921

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Solution

The fourth proportional to 21,354.28, 29,467.94 and 11,921 is: 16,450.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.28 : 29,467.94 = 11,921 : x
  2. Step 2: Convert to fraction form
    21,354.28/29,467.94 = 11,921/x
  3. Step 3: Cross multiply
    21,354.28x = 29,467.94 × 11,921
  4. Step 4: Simplify right side
    21,354.28x = 351,287,312.74
  5. Step 5: Solve for x
    x = 351,287,312.74/21,354.28
  6. Step 6: Final answer
    x = 16,450.44

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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.