Home / 21,119.26-29,137.17-13,154.89

Finding the Fourth Proportional to 21,119.26, 29,137.17 and 13,154.89

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Solution

The fourth proportional to 21,119.26, 29,137.17 and 13,154.89 is: 18,149.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.26 : 29,137.17 = 13,154.89 : x
  2. Step 2: Convert to fraction form
    21,119.26/29,137.17 = 13,154.89/x
  3. Step 3: Cross multiply
    21,119.26x = 29,137.17 × 13,154.89
  4. Step 4: Simplify right side
    21,119.26x = 383,296,266.26
  5. Step 5: Solve for x
    x = 383,296,266.26/21,119.26
  6. Step 6: Final answer
    x = 18,149.13

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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.