Home / 21,107.62-29,134.26-13,145.14

Finding the Fourth Proportional to 21,107.62, 29,134.26 and 13,145.14

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Solution

The fourth proportional to 21,107.62, 29,134.26 and 13,145.14 is: 18,143.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.62 : 29,134.26 = 13,145.14 : x
  2. Step 2: Convert to fraction form
    21,107.62/29,134.26 = 13,145.14/x
  3. Step 3: Cross multiply
    21,107.62x = 29,134.26 × 13,145.14
  4. Step 4: Simplify right side
    21,107.62x = 382,973,926.50
  5. Step 5: Solve for x
    x = 382,973,926.50/21,107.62
  6. Step 6: Final answer
    x = 18,143.87

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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.