Home / 21,148.68-29,186.22-11,717.28

Finding the Fourth Proportional to 21,148.68, 29,186.22 and 11,717.28

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Solution

The fourth proportional to 21,148.68, 29,186.22 and 11,717.28 is: 16,170.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.68 : 29,186.22 = 11,717.28 : x
  2. Step 2: Convert to fraction form
    21,148.68/29,186.22 = 11,717.28/x
  3. Step 3: Cross multiply
    21,148.68x = 29,186.22 × 11,717.28
  4. Step 4: Simplify right side
    21,148.68x = 341,983,111.88
  5. Step 5: Solve for x
    x = 341,983,111.88/21,148.68
  6. Step 6: Final answer
    x = 16,170.42

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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.