Home / 21,103.21-29,121.20-11,541.23

Finding the Fourth Proportional to 21,103.21, 29,121.20 and 11,541.23

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Solution

The fourth proportional to 21,103.21, 29,121.20 and 11,541.23 is: 15,926.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.21 : 29,121.20 = 11,541.23 : x
  2. Step 2: Convert to fraction form
    21,103.21/29,121.20 = 11,541.23/x
  3. Step 3: Cross multiply
    21,103.21x = 29,121.20 × 11,541.23
  4. Step 4: Simplify right side
    21,103.21x = 336,094,467.08
  5. Step 5: Solve for x
    x = 336,094,467.08/21,103.21
  6. Step 6: Final answer
    x = 15,926.23

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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.