Home / 21,145.82-29,180.91-11,585.63

Finding the Fourth Proportional to 21,145.82, 29,180.91 and 11,585.63

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Solution

The fourth proportional to 21,145.82, 29,180.91 and 11,585.63 is: 15,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.82 : 29,180.91 = 11,585.63 : x
  2. Step 2: Convert to fraction form
    21,145.82/29,180.91 = 11,585.63/x
  3. Step 3: Cross multiply
    21,145.82x = 29,180.91 × 11,585.63
  4. Step 4: Simplify right side
    21,145.82x = 338,079,168.40
  5. Step 5: Solve for x
    x = 338,079,168.40/21,145.82
  6. Step 6: Final answer
    x = 15,987.99

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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.